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    Wyświetlanie 1-34 z 34
    Tytuł:
    Superconductivity in ThIr₂Si₂
    Autorzy:
    Domieracki, K.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398629.pdf
    Data publikacji:
    2016-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.-q
    74.70.Dd
    Opis:
    The compound ThIr₂Si₂ crystallizes with a tetragonal crystal structure of the CaBe₂Ge₂-type (space group P4/nmm). Its low-temperature physical properties were investigated by means of magnetization, electrical resistivity, and heat capacity measurements, performed down to 0.35 K. The experiments revealed bulk superconductivity below $T_{c}$ = 2 K. The obtained data indicate that ThIr₂Si₂ is a weakly-coupled type-II BCS superconductor.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 2; 593-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single-Crystal Growth of f-Electron Intermetallics in a Tetra-Arc Czochralski Furnace
    Autorzy:
    Szlawska, M.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399475.pdf
    Data publikacji:
    2013-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    06.60.Ei
    75.30.Gw
    Opis:
    The Czochralski technique has induced technological revolution in the electronic industry. It has also been widely used in the fundamental research area, as it allows obtaining high-quality single crystals of large variety of binary, ternary and multinary compounds. The unique tetra-arc Czochralski furnace installed at the Institute of Low Temperature and Structure Research, Polish Academy of Sciences in Wrocław, described in detail in the article, has been used to prepare a large number of single crystals of various Ce- and U-based intermetallic phases. Their excellent quality has facilitated advanced investigations of their anisotropic, often highly unusual physical properties.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 2; 336-339
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Behaviour in CeNiGa$\text{}_{2}$ and Ce$\text{}_{2}$Ni$\text{}_{2}$Ga
    Autorzy:
    Kaczorowski, D.
    Rogl, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964573.pdf
    Data publikacji:
    1997-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.Hr
    75.30.Mb
    Opis:
    The bulk properties of CeNiGa$\text{}_{2}$ and Ce$\text{}_{2}$Νi$\text{}_{2}$Ga were studied by means of magnetic susceptibility, magnetization and electrical resistivity measurements. It was found that CeNiGa$\text{}_{2}$ is an antiferromagnetically ordered dense Kondo system whereas Ce$\text{}_{2}$Ni$\text{}_{2}$Ga exhibits a fluctuating valence behaviour.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 2; 289-293
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic and Related Properties of Ternary TmTX Intermetallics
    Autorzy:
    Kaczorowski, D.
    Szytuła, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1387896.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.-m
    75.30.Cr
    75.30.Kz
    75.50.Ee
    75.47.Np
    75.40.Cx
    Opis:
    We report on the magnetic and thermal properties of a few TmTX compounds, where T = d-electron metal and X = p-electron element. In all these ternaries but TmRuGe the thulium magnetic moments order antiferro- or ferromagnetically at low temperatures. The specific heat data confirms the magnetic orderings and reveals the influence of crystalline electric field effects.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 620-622
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-Step Magnetic Phase Transition in $CeRh_3Si_2$ Studied by Specific Heat Measurements
    Autorzy:
    Pikul, A.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810486.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Mb
    75.50.Ee
    75.30.Kz
    65.40.Ba
    Opis:
    High-quality single crystal of a novel cerium silicide $CeRh_3Si_2$, crystallizing with the orthorhombic $ErRh_3Si_2$-type structure, was grown by the Czochralski pulling method and studied by means of specific heat measurements. The antiferromagnetic ordering of the compound manifests itself as a pronounced lambda-shaped anomaly at $T_N$ = 4.72(3) K, and is followed by a spike-shaped anomaly due to spin reorientation at $T_t$ = 4.48(2) K, in good agreement with the previously reported magnetic susceptibility data. Both transitions are very sensitive to applied magnetic field - they split into four separate anomalies, which independently shift to lower temperatures with rising field. Several scenarios are proposed as possible explanations of the multi-step character of the magnetic ordering in $CeRh_3Si_2$.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 235-237
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-Temperature Physical Properties of Single-Crystalline EuCoGe₃ and EuRhGe₃
    Autorzy:
    Bednarchuk, O.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386301.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    72.15.-v
    65.40.-b
    Opis:
    Since a few years europium-based intermetallics have been attracting more and more attention due to their intriguing physical properties with anomalous behaviours in magnetically ordered states. Here, we report on the formation and the bulk physical properties of two tetragonal compounds EuCoGe₃ and EuRhGe₃, studied on high-quality single-crystalline specimens. In both materials, the Eu ions are in their divalent state, which gives rise to an antiferromagnetic ordering below $T_{N}$ = 15.4 K and $T_{N}$ = 11.3 K, respectively. In addition, EuCoGe₃ exhibits a successive antiferromagnetic phase transition at T₂ = 13.4 K. Based on some characteristic features in the temperature variations of the magnetic susceptibility, specific heat and electrical resistivity, we suggest that in both germanides an amplitude modulated magnetic structure develops below the respective $T_{N}$, with the Eu magnetic moments directed along the crystallographic [001] axis in EuCoGe₃ and perpendicular to this direction in EuRhGe₃.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 418-420
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetocaloric effect in antiferromagnetic half-Heusler alloy DyNiSb
    Autorzy:
    Synoradzki, K.
    Ciesielski, K.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1050664.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    75.30.Sg
    Opis:
    The low-temperature magnetic, thermal and magnetocaloric properties of the half-Heusler compound DyNiSb were studied on polycrystalline samples. The temperature variations of the magnetization and the heat capacity revealed a phase transition from paramagnetic to antiferromagnetic state at the Néel temperature T_{N} = 3.1 K. The compound exhibits normal and inverse magnetocaloric effect with the isothermal magnetic entropy change reaching 5.2 J/(kg K) at 4.8 K for a magnetic field change of 3 T. The estimated refrigerant capacity is about 58 J/kg.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 691-693
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic and Transport Properties of Possibly Topologically Nontrivial Half-Heusler Bismuthides RMBi (R = Y, Gd, Dy, Ho, Lu; M = Pd, Pt)
    Autorzy:
    Pavlosiuk, O.
    Kaczorowski, D.
    Wiśniewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398607.pdf
    Data publikacji:
    2016-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Eh
    71.55.Ak
    72.15.Eb
    72.15.Jf
    Opis:
    High quality single crystals of some representatives of half-Heusler family were grown from Bi-flux. For single crystals characterization, X-ray diffraction and scanning electron microscopy techniques were used. The low-temperature physical properties of the synthesized crystals were determined by means of magnetization, magnetic susceptibility, electrical resistivity and heat capacity measurements. For each compound but LuPtBi, the electrical resistivity varies in a semimetallic manner at high temperatures, and exhibits a metallic character at low temperatures. LuPtBi is metallic in the whole temperature range studied. The bismuthides HoPdBi, LuPdBi, LuPtBi and YPtBi were found superconducting below the critical temperature $T_{c}$ = 0.7, 1.8, 0.9, and 0.96 K, respectively. For the compounds GdPdBi, DyPdBi and HoPdBi, an antiferromagnetic ordering was found to set in below $T_{N}$ = 12.8, 3.7, and 1.9 K, respectively. HoPdBi is thus an intriguing material in which both cooperative phenomena coexist.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 2; 573-576
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic and Electronic Properties in Series of $GdT_{x}Ga_{4-x}$ Solid Solutions (T = Ni or Cu)
    Autorzy:
    Wiśniewski, P.
    Gorzelniak, R.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1385707.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    72.15.-v
    72.15.Jf
    Opis:
    We present results of extensive measurements of magnetic susceptibility, electrical resistance, specific heat and thermoelectric power of two series of solid solutions $GdNi_{x}Ga_{4-x}$ and $GdCu_{x}Ga_{4-x}$, for ranges of doping x from 0.6 to 1 and from 1 to 1.5, respectively. All studied phases display the Curie-Weiss behaviour of magnetic susceptibility and antiferromagnetic ordering at temperatures below 23 K. Substitution of gallium with transition metal atoms has strong influence on Néel temperatures of all studied phases, shifting them by few K, depending on x. Metamagnetic-like anomalies are observed for some compositions. Behaviour of the electrical resistivity reveals metallic nature of all samples. Their magnetic ordering is reflected in low-temperature anomalies of the resistivity and the heat capacity.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 382-384
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antiferromagnetic order in the half-Heusler phase TbPdBi
    Autorzy:
    Pavlosiuk, O.
    Kleinert, M.
    Wiśniewski, P.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1047687.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    75.80.+q
    71.55.Ak
    72.15.Eb
    Opis:
    Single crystals of TbPdBi, a representative of the group of half-Heusler bismuthides, were studied by means of magnetic susceptibility, heat capacity, electrical resistivity, magnetostriction and thermal expansion measurements. The compound was characterized as an antiferromagnet with the Néel temperature T_{N} ≈5.3 K. Neutron diffraction experiment confirmed the antiferromagnetic ordering and yielded the propagation vector k=(1/2,1/2,1/2). Remarkably, this k vector is in accord with the recently developed theory of antiferromagnetic topological insulators.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 498-500
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermoelectric Power of Single-Crystalline $Ce_{2}RhSi_{3}$
    Autorzy:
    Szlawska, M.
    Kaczorowski, D.
    Plackowski, T.
    Gulay, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810404.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.27.+a
    75.50.Ee
    72.15.Jf
    Opis:
    High-quality single crystal of $Ce_{2}RhSi_{3}$ was studied by means of thermoelectric power measurements carried out down to 2 K in external magnetic fields up to 13 T. The results obtained above 50 K were interpreted in terms of a modified two-band model that takes into account temperature variation of the width of 4f-derived narrow band located near the Fermi level. At lower temperatures the thermopower exhibits more complex temperature dependences that likely involve interplays of magnetic exchange, Kondo and crystal-field interactions.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 132-134
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Breakdown of the De Gennes Scaling in Y$\text{}_{1-x}$Dy$\text{}_{x}$Ni$\text{}_{2}$B$\text{}_{2}$C
    Autorzy:
    Drzazga, Z.
    Winiarska, A.
    Winiarski, A.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2012891.pdf
    Data publikacji:
    2000-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.72.-h
    82.80.Pv
    Opis:
    Single crystals of Y$\text{}_{1-x}$Dy$\text{}_{x}$Ni$\text{}_{2}$B$\text{}_{2}$C (1 ≤ x ≤ 0.7) were examined by X-ray diffraction and stoichiometry was attested by XPS measurements. The superconducting transition temperature T$\text{}_{c}$ and Neel temperature T$\text{}_{N}$ were determined by means of magnetisation measurements. A dramatic breakdown of the de Gennes scaling in the Dy-rich compounds was found when T$\text{}_{c}$
    Źródło:
    Acta Physica Polonica A; 2000, 97, 1; 221-224
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Magnetic Properties of Dy(Fe,V,Si)$\text{}_{12}$ Compounds
    Autorzy:
    Drzazga, Z.
    Winiarska, A.
    Chrobak, A.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964633.pdf
    Data publikacji:
    1997-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.50.Gg
    75.30.Cr
    61.10.-i
    Opis:
    An influence of Si on the structural and magnetic properties of Dy(Fe,V,Si)$\text{}_{12}$ compounds is studied. X-ray diffraction shows that these materials crystallise in the tetragonal ThMn$\text{}_{12}$-type structure. An increase in the saturation magnetization, the Curie temperatures and magnetocrystalline anisotropy in the Si substitutional systems is observed when compared with DyFe$\text{}_{12-x}$V$\text{}_{x}$. The magnetic properties depend on the preferential site occupation and concentration of Si and V atoms in these compounds.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 2; 335-338
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantum Interference in Disordered Ferromagnet U₂NiSi₃
    Autorzy:
    Gnida, D.
    Szlawska, M.
    Wiśniewski, P.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386551.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.-v
    75.50.Lk
    72.15.Rn
    Opis:
    A single-crystalline sample of disordered ferromagnetic U₂NiSi₃ was investigated by means of electrical resistivity measurements under ambient and high hydrostatic pressure. Temperature dependences of the electrical resistivity clearly reveal interplay of the ferromagnetic ordering and quantum interference effects resulting from crystallographic disorder. Electron-electron interaction manifests itself as a $T^{0.5}$ increase in the in-plane and out-of-plane electrical resistivity below 5 K. Weak localization is observed solely in the ab-plane as a linear-in-T contribution to resistivity, which suggests that internal magnetic field does not break the interference of scattered electron waves in ab-plane. Applied hydrostatic pressure does not affect the $T^{0.5}$ electron-electron interaction contribution, however it diminishes the impact of weak localization on the ab-plane resistivity.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 451-453
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Substitution Study on the Coherent Kondo State in CeCu$\text{}_{5}$In
    Autorzy:
    Kaczorowski, D.
    Kalychak, Ya. M.
    Zaremba, V. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2012871.pdf
    Data publikacji:
    2000-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Mb
    72.15.Qm
    75.20.Hr
    Opis:
    Ternary alloys CeCu$\text{}_{5-x}$In$\text{}_{1+x}$ were studied by means of magnetic and electrical resistivity measurements. In CeCu$\text{}_{5}$In a coherent Kondo state without long-range magnetic order develops at low temperatures. It transforms into an incoherent Kondo state upon small substitution of In for Cu.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 1; 189-192
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-Temperature Specific Heat and Magnetocaloric Effect in $RCu_2Ge_2$ (R = Dy-Tm) Compounds
    Autorzy:
    Gondek, Ł.
    Kaczorowski, D.
    Pikul, A.
    Szytuła, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419609.pdf
    Data publikacji:
    2012-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.-m
    75.30.Sg
    75.40.Cx
    Opis:
    The magnetocaloric effect in $RCu_2Ge_2$ (R = Dy-Tm) was investigated by means of specific heat measurements. The compounds order antiferromagnetically at 6.2 K $(DyCu_2Ge_2),$ 5.6 K $(HoCu_2Ge_2),$ 3.0 K $(ErCu_2Ge_2),$ and 3.9 K $(TmCu_2Ge_2),$ and some of them exhibit additional magnetic transitions in the ordered state. In an external magnetic field the low-temperature specific heat changes significantly, which can be attributed to metamagnetic-like transitions. In this temperature region, the investigated samples show distinctly different magnetocaloric effect.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 2; 391-393
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Order and SdH Effect in Half-Heusler Phase ErPdBi
    Autorzy:
    Pavlosiuk, O.
    Filar, K.
    Wiśniewski, P.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1388106.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.10.+v
    75.40.Cx
    71.18.+y
    71.20.Eh
    72.15.Gd
    Opis:
    Single crystals of ErPdBi were grown from Bi-flux. The crystal structure of MgAgAs-type was confirmed using X-ray diffraction. Magnetization, magnetic susceptibility, electrical resistance and heat capacity measurements revealed an antiferromagnetic phase transition at $T_{N}$ = 1.2 K. At high temperatures, the electrical resistance has a semiconducting-like character (dR/dT < 0 ). The resistance starts decreasing with decreasing T below 15 K and shows a very sharp drop below $T_{N}$ but remains finite down to 0.4 K. Hence, no obvious evidence of superconductivity was found in the electrical transport data. On the other hand, the real part of AC magnetic susceptibility is negative below $T_{C}$ = 1.6 K and its imaginary component has a clear maximum at this temperature that might be associated with the onset of superconducting state. The electrical resistance revealed Shubnikov-de Haas oscillations in magnetic fields 8-33 T. Their amplitude decreases with increasing T and disappears above 10 K. Cyclotron mass determined from this dependence is 0.21 $m_{e}$.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 656-658
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic Structure of Ternary Antimonides YbPdSb
    Autorzy:
    Hermanowicz, M.
    Jezierski, A.
    Kaczkowski, J.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810476.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.-b
    71.15.Ap
    71.15.Mb
    71.20.Eh
    71.20.Lp
    Opis:
    In this paper we present the electronic structure and magnetic properties of YbPdSb in low-temperature MgAsAg-type structure and high-temperature TiNiSi-type structure. The calculations were performed by ab initio full-relativistic full potential local orbital method within the local spin density approximation. Ab initio calculations showed the metallic character of YbPdSb compound in both structures. The density of states at the Fermi level is greater in high-temperature than in low-temperature structure.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 226-228
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anomalous Transport and Thermal Properties of the Solid Solutions U$\text{}_{1-x}$Th$\text{}_{x}$Cu$\text{}_{5}$M (M = Al, Ga, In and Sn)
    Autorzy:
    Troć, R.
    Tran, V. H.
    Kaczorowski, D.
    Czopnik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011211.pdf
    Data publikacji:
    2000-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Mb
    72.15.Qm
    75.20.Hr
    Opis:
    UCu$\text{}_{5}$M-type compounds are moderate heavy fermion systems with an antiferromagnetic order below T$\text{}_{N}$ = 18, 16-25, and 25 K for M = Al, (Ga, In), and In, respectively, and a ferrimagnetic order with T$\text{}_{C}$ = 54 K for M = Sn. We present the results of magnetoresistance measurements as a function of temperature and applied magnetic field for the pure compounds and for their solid solutions containing Th, i.e. U$\text{}_{1-x}$Th$\text{}_{x}$Cu$\text{}_{5}$M. Only in the case of UCu$\text{}_{5}$In a substantial positive contribution to the magnetoresistance was observed at low temperatures, as for normal antiferromagnets. For the Al- and Sn-based alloys the magnetoresistance at low temperatures is negative, and its field variation proves the existence of Kondo-type interactions. On Th-substitution the magnetic phase transition is shifted to lower temperature and simultaneously the magnetoresistance becomes less negative. The field dependence of the magnetoresistance of these alloys can be well described by the Coqblin-Schrieffer model. Interestingly, the heat capacity measurements have revealed a general tendency to increase the linear coefficient γ with magnetic dilution of a given UCu$\text{}_{5}$M compound by Th-substitution. This feature reflects an enlargement of the effective mass of conduction electrons with the increase in both the unit cell volume and magnetic dilution. Such a tendency is also observed for the system UCu$\text{}_{5}$(In$\text{}_{1-x}$Ga$\text{}_{x}$), though the unit cell is here suppressed with increasing x. Thus, a similar physical picture is reached in all these systems but involving probably different mechanisms.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 1; 25-35
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Giant Magnetoresistance and Shubnikov-de Haas Effect in LuSb
    Autorzy:
    Kleinert, M.
    Pavlosiuk, O.
    Swatek, P.
    Kaczorowski, D.
    Wiśniewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030528.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Eh
    71.55.Ak
    72.15.Eb
    Opis:
    Single-crystals of LuSb were investigated by means of electrical resistivity and magnetoresistance measurements. The compound was found to exhibit giant magnetoresistance exceeding 3000%, low-temperature resistivity plateau, and Shubnikov-de Haas oscillations. It was characterized as a semimetal with nearly balanced contributions of electron and hole carriers to the magnetotransport properties. The experimental findings, supported by the results of electronic structure calculations, proved that the magnetotransport in LuSb can be described in the scope of 3D multi-band Fermi surface model without topologically non-trivial electronic states.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 538-540
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of $RSn_{2}$ (R = Tb, Dy) Compounds
    Autorzy:
    Szytuła, A.
    Kaczorowski, D.
    Gondek, Ł.
    Czub, J.
    Nenkov, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538313.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.-s
    75.30.Kz
    72.15.Eb
    Opis:
    Polycrystalline samples of $TbSn_{2}$ and $DySn_{2}$ were studied by means of magnetic susceptibility, electrical resistivity and heat capacity measurements. Both compounds have been found to order antiferromagnetically at low temperatures with some extra features in the ordered state due to changes in their magnetic structures. The two stannides exhibit metallic conductivity. The estimated crystal field levels splitting of $Tb^{3+}$ and $Dy^{3+}$ ground multiplets do not exceed 75 K.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 586-589
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Ordering in $ErFe_{0.3}Ge_{2}$ and $ErNi_{0.65}Ge_{2}$ Compounds
    Autorzy:
    Penc, B.
    Arulraj, A.
    Kaczorowski, D.
    Szytuła, A.
    Wawrzyńska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538339.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Lp
    75.50.Ee
    Opis:
    The magnetic ordering in $ErFe_{0.3}Ge_{2}$ and $ErNi_{0.65}Ge_{2}$ compounds crystallizing in the orthorhombic structure of the $CeNiSi_{2}$-type has been investigated by neutron diffraction and magnetic measurements. The Er magnetic moments have been found to order antiferromagnetically below 2.5 K in $ErFe_{0.3}Ge_{2}$ and 2.3 K in $ErNi_{0.65}Ge_{2}$. The magnetic structure of the former compound can be described by the propagation vector k = (0.044(1), 0, 0.384(1)). The Er magnetic moments are aligned along the a-axis and alternate with the sequence ++- in the unit cell. At 1.5 K they are equal to 5.9(1) $μ_{B}$. In contrast, the magnetic unit cell of $ErNi_{0.65}Ge_{2}$ has been established to be equal to the chemical one. The magnetic moments in this compound are arranged in a collinear manner pointing along the a-axis with the sequence +-+-. The Er moment value measured at 1.5 K is 2.90(8) $μ_{B}$.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 595-598
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Co Doping on Crystal and Magnetic Properties of $Gd_2Cu_2In$
    Autorzy:
    Gondek, Ł.
    Szytuła, A.
    Kaczorowski, D.
    Szewczyk, A.
    Gutowska, M.
    Tyvanchuk, Yu.
    Kalychak, Ya.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419907.pdf
    Data publikacji:
    2012-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.-m
    75.30.Kz
    75.50.Ee
    Opis:
    Physical properties of $Gd_2Cu_{2 - x}Co_{x}In$ (x = 0.1, 0.2, 0.3) samples are investigated. The paper brings results of X-ray diffraction, magnetometric as well as specific heat studies. It was found that only sample with x = 0.1 exhibits desired crystal structure. Other compositions show existence of impurities due to lack of dissolution Co atoms. For $Gd_2Cu_{1.9}Co_{0.1}In$ sample the Curie temperature of 92.5 K was evidenced. Thus, an enhancement of ferromagnetic correlations with comparison to $Gd_2Cu_2In$ sample was evidenced. It was found that $Gd_2Cu_{1.9}Co_{0.1}In$ sample exhibits magnetocaloric effect within broad temperature range.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 1; 216-219
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Carbon on Spin Reorientation Processes in $Er_{2-x}R_xFe_{14}C$ (R~=~Gd, Pr) - Mössbauer and Magnetometric Studies
    Autorzy:
    Pędziwiatr, A.
    Krawiec, K.
    Bogacz, B.
    Kapusta, Cz.
    Przewoźnik, J.
    Kaczorowski, D.
    Talik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506592.pdf
    Data publikacji:
    2011-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    75.25.-j
    75.50.-y
    75.50.Bb
    Opis:
    The $Er_{2-x}R_{x}Fe_{14}C$ (R=Gd, Pr) polycrystalline compounds have been synthesized and investigated with $\text{}^{57}Fe$ Mössbauer spectroscopy and magnetic measurements. The spin reorientation phenomena were studied extensively by narrow step temperature scanning in the neighborhood of the spin reorientation temperature. Obtained Mössbauer spectra were analyzed using a procedure of simultaneous fitting and the transmission integral approach. Consistent description of Mössbauer spectra were obtained, temperature and composition dependencies of hyperfine interaction parameters and subspectra contributions were derived from fits and the transition temperatures were determined for all the compounds studied. Initial magnetization versus temperature measurements (in zero and non-zero external field) for $Er_{2-x}Gd_{x}Fe_{14}C$ compounds allowed to establish the temperature regions of reorientation, change of magnetization value during the transition process. The results obtained with different methods were analyzed and the spin arrangement diagrams were constructed. Data obtained for $Er_{2-x}Gd_{x}Fe_{14}C$ were compared with those for $Er_{2-x}Gd_{x}Fe_{14}B$ series.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 1; 48-51
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pressure Effect on Magnetic Properties of UGa$\text{}_{3}$
    Autorzy:
    Grechnev, G. E.
    Delin, A.
    Eriksson, O.
    Johansson, B.
    Panfilov, A. S.
    Svechkarev, I. V.
    Kaczorowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964627.pdf
    Data publikacji:
    1997-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.10.Lp
    75.20.En
    Opis:
    The magnetic susceptibility, χ, of the itinerant antiferromagnetic compound UGa$\text{}_{3}$ was studied under pressure up to 2 kbar in the temperature range 64-300 K. The measured pressure derivative of the Néel temperature is found to be dT$\text{}_{N}$/dP=-1.1 K/kbar. In order to analyze the experimental magnetovolume effect values, d lnχ/d lnV, the volume dependent electronic structure of UGa$\text{}_{3}$ has been calculated ab initio in a paramagnetic phase by employing a relativistic full-potential linear muffin tin orbital method and including an external magnetic field self-consistently. The calculations revealed a predominance of itinerant uranium f-states at the Fermi energy, as well as a large orbital contribution to χ.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 2; 331-333
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Valence Band of $Ce_2Co_{0.8}Si_{3.2}$ and $Ce_2RhSi_3$ Studied by Resonant Photoemission Spectroscopy and FPLO Calculations
    Autorzy:
    Starowicz, P.
    Kurleto, R.
    Goraus, J.
    Walczak, Ł.
    Penc, B.
    Adell, J.
    Szlawska, M.
    Kaczorowski, D.
    Szytuła, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1374249.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.27.+a
    75.30.Mb
    71.20.Eh
    74.25.Jb
    Opis:
    This work presents studies of the valence band of two Kondo lattice systems: $Ce_2Co_{0.8}Si_{3.2}$, which is paramagnetic with the Kondo temperature $T_{K}$ ≈50 K and $Ce_2RhSi_3$, which is antiferromagnetic below $T_{N}$=4.5 K and exhibits $T_{K}$ ≈9 K. The photoemission spectra, which are obtained with photon energy tuned to Ce 4d-4f resonance, reveal a Kondo peak at the Fermi energy $(E_{F})$, its spin-orbit splitting partner at 0.24 eV and a broad maximum related to Ce $f^0$ final state. The spectra indicate that Kondo peak has a higher intensity for $Ce_2Co_{0.8}Si_{3.2}$. The off-resonance photoemission data reveal that a maximum in the 3d electron density of states is shifted towards $E_{F}$ for $Ce_2Co_{0.8}Si_{3.2}$ as compared to $Ce_2RhSi_3$. Full-potential local-orbital calculations were realized with local spin density approach +U approach for 213 stoichiometry. They show that a higher density of states near $E_{F}$ is observed for $Ce_2CoSi_3$. The calculations also reveal the existing tendencies for antiferromagnetic and ferromagnetic ground states in a case of $Ce_2RhSi_3$ and $Ce_2CoSi_3$, respectively.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4a; A-144-A-147
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakteryzacja właściwości mechanicznych warstw węglowych na UHDPE
    Mechanical characterization of carbon-based layers onto UHDPE
    Autorzy:
    Batory, D.
    Grabarczyk, J.
    Kaczorowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/283852.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    UHDPE
    warstwy węglowe
    MW
    RF
    MS
    carbon coating
    Opis:
    Polietylen dużej gęstości (UHDPE - Ultra High Density Polyethylene) jest jednym z najpopularniejszych polimerów stosowanych w medycynie. Z materiałem tym bardzo często możemy się spotkać w konstrukcjach stawów biodrowych czy kolanowych, gdzie nie bez znaczenia są ich odpowiednie właściwości mechaniczne. W zastosowaniach, gdzie wymagany jest niski współczynnik tarcia i wysoka odporność na zużycie, warstwy węglowe wydają się być najlepszym rozwiązaniem. Dodatkowo oprócz pozytywnego wpływu warstw węglowych na właściwości mechaniczne, powłoki te wpływają na poprawę biozgodności pokrywanych materiałów. Celem przeprowadzonych badań była charakteryzacja mechanicznych właściwości warstw węglowych wytworzonych na podłożu UHDPE z użyciem różnych metod CVD i PVD. Najistotniejszym zagadaniem było zbadanie zależności pomiędzy współczynnikiem tarcia i odpornością na zużycie a zastosowaną metodą i parametrami wytwarzania warstw. Badania trybologiczne zostały wykonane metodą pin-on-disc. Uzyskane wyniki wskazują na możliwości wykorzystania warstw węglowych na podłożu polimeru UHDPE jako powłok poprawiających odporność na zużycie oraz zmniejszających współczynnik tarcia.
    Ultra High Density Polyethylene (UHDPE) is one of the most popular polymer materials widely used in medicine. Very often UHDPE it utilised in hip joint and knee constructions, were its perfect mechanical properties are very important. Carbon-based layers seem to be very attractive material for many applications where low friction coefficient and high wear resistant are needed. Beside of positive mechanical properties these layers improve biocompatibility of covered surfaces. The aim of the study was the characterization of mechanical properties of different types of carbon-based layers manufactured with use of CVD and PVD methods on UHDPE. Precisely the purpose was to find the correlation between obtained friction and wear parameters and applied method and the deposition parameters. The friction coefficient and wear resistance were measured by the pin-on-disc method. As a result of the investigations it was noticed that hard carbon layers deposited on Ultra High Density Polyethylene’s surface noticeably improve its wear resistance and ensure very low friction coefficient.
    Źródło:
    Engineering of Biomaterials; 2008, 11, 76; 24-27
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie parametrów fali uderzeniowej powstającej przy wytwarzaniu aerozolu wodnego metodą wybuchową
    Investigation of characteristics of shock-waves produced by water bag explosion
    Autorzy:
    Dygdała, R.
    Śmigielski, G.
    Lewandowski, D.
    Kaczorowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/234918.pdf
    Data publikacji:
    2007
    Wydawca:
    Wojskowy Instytut Techniczny Uzbrojenia
    Tematy:
    aerozole bojowe
    aerozol wodny
    combat aerosols
    Opis:
    W artykule przedstawiono wyniki badań parametrów fali uderzeniowej powstającej przy wytwarzaniu aerozolu wodnego metodą wybuchową.
    The paper presents results of investigations of parameters of the shock-wave generated in the process of explosive formation of water-spray. The spray was produced by exploding a charge located inside a hag fitled with water (called shortly water-bag). The measurements have been carried on for three kinds of explosive materials (Emulinit, Saletrol and Plastic), for three sizes of the water-bag (600 dm3, 1200 dm3 and 1500 dm3) and for explosion energies varying from 4 MJ to 20 MJ. The experimental setup consisted of the water-bag hung 10 m over the ground, of a fast video-camera registering expansion of the water-spray cloud, and of piezoelectric sensors placed along the direction of the shock-wave propagation that were coupled on-line with a registering-controlling computer system. The objective of the investigations consisted in measuring the shock-wave propagation velocity and pressure variation as well as determining expansion velocity of the cloud as a function of its diameter for various explosive energies, water-bag sizes and explosive material used. The measurements served as a test for verification of theoretical hypotheses concerning explosive production and expansion of the water-spray cloud. The tests allowed to optimize the water-bag size, the kind of explosive material and the explosion energy from the point of view of maximizing cloud's diameter and minimizing droplets' radii.
    Źródło:
    Problemy Techniki Uzbrojenia; 2007, R. 36, z. 104; 71-78
    1230-3801
    Pojawia się w:
    Problemy Techniki Uzbrojenia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aerosol produced by explosive detonation
    Wytwarzanie aerozolu w procesie detonacji
    Autorzy:
    Dygdała, R.
    Stefański, K.
    Śmigielski, G.
    Lewandowski, D.
    Kaczorowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/155545.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    fire extingushing
    ultrafast camera measurement
    explosive aerosol production
    metrological parameters of aerosol expansion
    gaszenie pożarów
    pomiary szybką kamerą
    wybuchowe tworzenie aerosolu wodnego
    parametry metrologiczne
    określenie odległości
    określenie prędkości
    Opis:
    This report presents main results achieved during field tests. The tests, as well as series of earlier tests performed from 2002 to 2005, where devoted specifically to the problem of the water-spray cloud fromation depending on the water-bag load and on the explosive charge as well as for determination of some metrological parameters. The registration of explosions of water-bags in a static etest mode hanging more than 12 meters above the ground using a video-camera with time resolution of 1000 frames per second and measurements of a pressure shock wave as a function of explosive charge and water bag load have been also performed (Fig. 1). The experimental results were compared with theoretical models of cloud formation elaborated by us.
    Artykuł prezentuje główne wyniki badań otrzymane podczas prób poligonowych przeprowadzonych w latach 2002 do 2006. Badania te dotyczyły formowania chmury aerozolu wodnego tworzonego metodą wybuchową w zależności od wielkości kapsuły wodnej i ładunku wybuchowego. Przy pomocy kamery video zapisującej obraz z szybkością 1000 klatek na sekundę rejestrowano eksplozje worków wypełnionych wodą (kapsuł wodnych), zawieszonych ponad 12 metrów nad ziemią. Wykonano również pomiary ciśnienia fali uderzeniowej za pomocą czujników piezoelektrycznych sprzężonych komputerem wyposażonym w system czasu rzeczywistego. Wyniki eksperymentalne zostały porównane z opracowanym przez nas modelem teoretycznym formowania chmury.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 357-360
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan obecny i strategia rozwoju branży węgla brunatnego w I połowie XXI wieku w Polsce
    Present status and development strategy of brown coal industry in the first half of XXI century
    Autorzy:
    Kasztelewicz, Z.
    Kaczorowski, J.
    Mazurek, S.
    Orlikowski, D.
    Żuk, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/349344.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    górnictwo odkrywkowe
    węgiel brunatny
    energetyka
    bezpieczeństwo energetyczne
    opencast mining
    brown coal
    power industry
    energetic safety
    Opis:
    Artykuł przedstawia stan obecny kopalń węgla brunatnego, a w tym osiągnięte podstawowe parametry produkcyjne od początku działalności do 2008 roku. Podstawowa część artykułu to założenia poszczególnych kopalń odnośnie utrzymania i rozwoju zdolności produkcyjnych w zagłębiach czynnych i perspektywicznych. Przedstawione są możliwe wielkości wydobycia węgla, mocy elektrowni i produkcji energii elektrycznej w czynnych i nowych elektrowniach oraz przetwórstwa chemicznego węgla brunatnego na paliwa płynne i gazowe.
    The article introduces the present state of brown coal mines, including fundamental production parameters from the beginnings of operation till year 2008. The main part of the article are assumptions concerning individual mines about sustaining and developing production capacity both in existing and perspective basins. There are also possible quantities of coal output, quantities of power and production of electric energy in active and new power plants as well as chemical processing of brown coal to liquid and gas fuels shown in the paper.
    Źródło:
    Górnictwo i Geoinżynieria; 2009, 33, 2; 213-231
    1732-6702
    Pojawia się w:
    Górnictwo i Geoinżynieria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explosive Formation and Spreading of Water-Spray Cloud - Experimental Development and Model Analyses
    Autorzy:
    Stefański, K.
    Lewandowski, D.
    Dygdała, R. S.
    Kaczorowski, M.
    Ingwer-Żabowska, M.
    Śmigielski, G.
    Papliński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/358806.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    explosion
    water aerosol production
    shock wave parameters
    Opis:
    The paper presents results of experimental investigations and model analysis concerning the expansion of explosively produced water-spray cloud. The regular shape of water-spray cloud produced by a charge placed in a bag flled with water is attained. Effective dispersion of bags containing 600 up to 1500 litres of water is attained. The rise and deceleration of external zone of water-spray cloud is described analytically. The parameters of pressure feld evolving around the explosively formed spray cloud were registered.
    Źródło:
    Central European Journal of Energetic Materials; 2009, 6, 3-4; 291-302
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasma oxidized Ti6Al4V and Ti6Al7Nb alloys for biomedical applications
    Autorzy:
    Pązik, B.
    Grabarczyk, J.
    Batory, D.
    Kaczorowski, W.
    Burnat, B.
    Czerniak-Reczulska, M.
    Makówka, M.
    Niedzielski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/285637.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    titanium alloys
    plasma oxidizing
    tribology
    wear
    corrosion
    Opis:
    Titanium and its alloys are one of the most popular metallic materials used in medicine for many years. Their favorable mechanical properties, high corrosion resistance and good biotolerance in an environment of tissues and body fluids, cause that they are widely used as construction material of orthopaedic dental and neurological implants. Their disadvantages are poor tribological properties manifested by high coefficient of friction, scuffing and tendency to formation of adhesive couplings. In many research centers the works on improving the unfavorable tribological properties of titanium alloys are conducted. They rely on the use of modern methods of surface treatment including the thermo-chemical methods (nitriding, carburizing, oxidation) and the synthesis of thin films using PVD and CVD methods. In the presented work the glow discharge oxidation was applied to improve the surface properties of two-phase Ti6Al4V and Ti6Al7Nb titanium alloys. The results include a description of the obtained structure of the surface layer, surface topography, micro-hardness, wear ratio and corrosion resistance. The obtained results indicate changes in the surface layer of the material. The surface hardness was more than doubled and the depth of increased hardness region was up to 85 microns. This, in turn, several times decreased the wear rate of the modified materials while reducing the wear rate of the countersample. At the same time the carried out thermo-chemical treatment did not cause any structural changes in the core material. The oxidation process preferably influenced the corrosion properties of titanium alloys. Both, significant increase in the corrosion potential (approx. 0.36 V), as well as increased polarization resistance were observed. The modified surfaces also retained a high resistance to pitting corrosion.
    Źródło:
    Engineering of Biomaterials; 2016, 19, 135; 8-12
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasma oxidized Ti6Al4V and Ti6Al7Nb alloys for biomedical applications
    Autorzy:
    Pązik, B.
    Grabarczyk, J.
    Batory, D.
    Kaczorowski, W.
    Burnat, B.
    Czerniak-Reczulska, M.
    Makówka, M.
    Niedzielski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/285698.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    Ti6Al4V alloy
    Ti-6Al-7Nb alloy
    biomaterials
    Źródło:
    Engineering of Biomaterials; 2016, 19, 138; 68
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geodynamic research at the Department of Planetary Geodesy, SRC PAS
    Autorzy:
    Brzeziński, A.
    Jóźwik, M.
    Kaczorowski, M.
    Kalarus, M.
    Kasza, D.
    Kosek, W.
    Nastula, J.
    Szczerbowski, Z.
    Wińska, M.
    Wronowski, R.
    Zdunek, R.
    Zieliński, J. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/106813.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    Department of Planetary Geodesy
    geodynamic research
    Wydział Geodezji Planetarnej
    badania geodynamiczne
    Opis:
    The Department of Planetary Geodesy of the Space Research Centre PAS has been conducting research on a broad spectrum of problems within a field of global dynamics of the Earth. In this report we describe the investigations on selected subjects concerning polar motion (modeling and geophysical interpretation of the Chandler wobble, hydrological excitation of seasonal signals, search for optimal prediction methods), tectonic activity in the region of the Książ Geodynamic Laboratory of the SRC, and finally the new joint Polish-Italian project GalAc analyzing feasibility and usefulness of equipping second-generation Galileo satellites with accelerometers.
    Źródło:
    Reports on Geodesy and Geoinformatics; 2016, 100; 131-147
    2391-8365
    2391-8152
    Pojawia się w:
    Reports on Geodesy and Geoinformatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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