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Wyświetlanie 1-15 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
Wyświetlanie 1-15 z 34

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