Autor: Klicpera, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Magnetic Phase Transitions in TbNi(Al,In) Compounds
Autorzy:: Klicpera, M.
Javorský, P.
Šantavá, E.
Powiązania:: https://bibliotekanauki.pl/articles/1534258.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.-m
75.40.Gb
Opis:: The magnetic phase transitions in $TbNiAl_{1-x}In_{x}$ compounds were investigated by ac-susceptibility measurements. Our data reveal magnetic ordering with transition temperatures between 40 and 70 K, depending on the In concentration. All the studied compounds exhibit two or more phase transitions accompanied by distinct anomalies in the real and imaginary part of the ac-susceptibility. The paramagnetic Curie temperatures remain positive in the whole series.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 881-883
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Magnetocaloric Effect of the $Tb_{1-x}Y_{x}NiAl$ and $TbNiAl_{1-y}In_{y}$ Series
Autorzy:: Kaštil, J.
Javorský, P.
Klicpera, M.
Powiązania:: https://bibliotekanauki.pl/articles/1534279.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Sg
Opis:: We have studied the development of the magnetocaloric effect in the (Tb,Y)NiAl and TbNi(Al,In) series as determined from magnetization measurements. The transition from antiferromagnetic order in TbNiAl to ferromagnetic order in $Tb_{0.7}Y_{0.3}NiAl$ is accompanied by increase of the maximum entropy change from - 4.1 to - 4.4 J $kg^{-1} K^{-1}$. In the TbNi(Al,In) series, the change of uniaxial anisotropy in TbNiAl to the easy-plane anisotropy in TbNiIn leads to broadening of the magnetocaloric effect accompanied with large increase of the relative cooling power from 66 to 120 J $kg^{-1}$.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 888-890
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Structural and Magnetic Properties of the $PrNi_{1-x}Cu_{x}Al$ Series
Autorzy:: Fikáček, J.
Javorský, P.
Klicpera, M.
Šantavá, E.
Powiązania:: https://bibliotekanauki.pl/articles/1534261.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.40.Cx
Opis:: Polycrystalline samples of $PrNi_{1-x}Cu_{x}Al$ series were studied by X-ray diffraction, magnetization and specific heat. The hexagonal ZrNiAl-type structure is preserved in the whole series. Compounds with x up to 0.4 order antiferromagnetically with the Néel temperatures between 3 and 5 K. The rest of the compounds (x = 0.5-0.9) exhibits a transition into a spin glass state below the freezing temperatures around 4 K. The analysis of the specific heat data reveals a quasi-doublet ground state well separated from higher crystal field levels in the whole series.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 884-885
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Structural Phase Transition in $CeCuAl_{3}$ Single Crystal
Autorzy:: Klicpera, M.
Javorský, P.
Daniš, S.
Brunátová, T.
Powiązania:: https://bibliotekanauki.pl/articles/1369117.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.C-
65.40.G-
66.70.Df
Opis:: The high temperature properties of $CeCuAl_{3}$ single crystal were investigated by differential scanning calorimetry and high-temperature x-ray diffraction. The structural phase transition takes place around 300 °C. The phase transition changes the structural parameters only, the tetragonal $BaNiSn_{3}$-type structure is preserved. The significant changes of lattice parameters and especially atomic fraction coordinates with this transition are discussed with respect to the number of heating/cooling cycles and stability in time. Magnetic properties of as-cast and annealed sample are shown for comparison.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 290-291
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Structural Phase Transition in CePd₂Ga₂ under Hydrostatic Pressure
Autorzy:: Doležal, P.
Klicpera, M.
Prchal, J.
Javorský, P.
Powiązania:: https://bibliotekanauki.pl/articles/1384830.pdf
Data publikacji:: 2015-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.50.Ks
62.50.-p
72.15.Eb
Opis:: The structural phase transition from tetragonal to triclinic structure in CePd₂Ga₂ compound was studied by means of electrical resistivity measurement under hydrostatic pressure. The shift of the transition to the higher temperature with increasing pressure was revealed: 195 K in 3 GPa compared to 125 K in ambient pressure.
Źródło:: Acta Physica Polonica A; 2015, 127, 2; 219-221
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Pressure Influence on Magnetic Properties of TbNiAl
Autorzy:: Javorský, P.
Prchal, J.
Klicpera, M.
Kaštil, J.
Míšek, M.
Powiązania:: https://bibliotekanauki.pl/articles/1368753.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Ee
75.30.-m
Opis:: We have investigated the effect of hydrostatic pressure on magnetic properties of TbNiAl, crystallizing in hexagonal ZrNiAl-type structure. TbNiAl orders antiferromagnetically below $T_{N}$=45 K and undergoes further magnetic phase transition to another AF phase at $T_{1}$=23 K. The magnetic field of $B_{c}$ ≅ 0.3 T applied along the c-axis at 2 K leads to the transition to ferromagnetic order. By applying the hydrostatic pressure, both $T_{N}$ and $T_{1}$ remain almost unaffected whereas $B_{c}$ shows a strong increase. The hydrostatic pressure stabilizes the antiferromagnetic state which can be related to development of structural parameters.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 280-281
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 7.

Tytuł:: Macroscopic and Microscopic Study of a CePdIn Compound
Autorzy:: Klicpera, M.
Javorský, P.
Puente-Orench, I.
Hoser, A.
Powiązania:: https://bibliotekanauki.pl/articles/1030269.pdf
Data publikacji:: 2017-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.F-
71.27.+a
72.15.Eb
Opis:: The magnetization and electrical resistivity measurements on a CePdIn single crystal as well as its preparation and structural characterization are presented. The negative paramagnetic Curie temperatures indicate antiferromagnetic ground state, the anisotropy of the paramagnetic Curie temperature amounts 22.7 K. No ferromagnetic correlations were indicated. Powder neutron diffraction experiment performed at temperatures down to 0.4 K did not lead to observation of any magnetic peak in diffraction patterns. We estimate the magnetic moment on Ce atoms to be significantly lower than 0.5 μ_{B}. The temperature development of lattice parameters documents the standard thermal expansion of the unit cell; no signs of structural phase transition were observed.
Źródło:: Acta Physica Polonica A; 2017, 131, 4; 970-972
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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