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Onset of Itinerant Ferromagnetism in Cobalt-Nickel Heusler-Type Compounds

100%
Pierre J., Skolozdra R., Gorelenko Y. k.
Acta Physica Polonica A
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1994
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vol. 85
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issue 1
209-213
EN
The magnetic properties of Co-Ni compounds with MnCu_{2}Al or MgAgAs-type structure (the Heusler phases) were studied. Paramagnetic, ferromagnetic moments, Curie's temperature increase with Co content. The ratio of ordered to paramagnetic moment varies with the Curie temperature following itinerant ferromagnetism models. A metal-insulator transition occurs in the TiCo_{x}Ni_{1-x}Sn series, which causes a more rapid drop of the Curie temperature than in TiCo_{x}Ni_{2-x}Sn solid solutions which remain metallic.
2
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Magnetic Phase Transitions in Intermetallic GdNi_{5-x}Sn_{1+x} and TbNi_{5-x}Sn_{1+x} Compounds

88%
Baran M., Szymczak H., Szymczak R., Romaka L., Skolozdra R.
Acta Physica Polonica A
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1997
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vol. 92
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issue 2
295-299
EN
Magnetization measurements were performed for intermetallic compounds GdNi_{5-x}Sn_{1+x} and TbNi_{5-x}Sn_{1+x} in the temperature range from 4.5 K to 280 K and in magnetic field up to 50 kOe. Complex magnetic phase diagram was revealed for both compounds. The results are discussed assuming three-sublattice magnetic structure and partial disordering of the structure.
3
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Magnetic and Transport Properties of R_3Cu_3Sb_4 Compounds (R = La, Ce, Pr, Nd, and Sm)

76%
Skolozdra R., Baran M., Horyn A., Szewczyk A., Gorelenko Y., Szymczak H., Szymczak R.
Acta Physica Polonica A
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2002
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vol. 102
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issue 3
429-435
EN
Magnetic susceptibility, electrical resistivity, and thermopower of the series of the R_3Cu_3Sb_4 compounds (R=La-Sm) were measured over the temperature ranges 1.9-300 K (susceptibility and resistivity) and 80-370 K (thermopower). Below 25 K, resistivity of these compounds grows exponentially with decreasing temperature. For some compounds, R = Ce, Sm, a maximum on temperature dependence of resistivity is observed. Ce_3Cu_3Sb_4 compound undergoes a magnetic transition at 12 K.
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