Thermally and field driven spin-state transitions in (Pr.sub.1-y./sub.Y.sub.y./sub.)Ca.sub.0.3./sub.CoO.sub.3./sub

0375495 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
Maryško, Miroslav - Jirák, Zdeněk - Knížek, Karel - Novák, Pavel - Hejtmánek, Jiří - Naito, T. - Sasaki, H. - Fujishiro, H.
Thermally and field driven spin-state transitions in (Pr_1-yY_y)Ca_0.3CoO₃
Journal of Applied Physics. Roč. 109, č. 7 (2011), 07E127/1-07E127/3. ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GA202/09/0421; GA AV ČR IAA400720619
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: cobaltites * phase-transition * spin-state
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.168, rok: 2011

The first-order character of the transition from the low- to - intermediate spin state in the system (Pr(1-y)Yy)Ca0.3CoO3 (y=0.075-0.15) has been verified by magnetization measurements.For y=0.075, the transition manifests itself in susceptibility steps at temperatures depending on external fields.In this case, isothermal measurements show a field-driven transition exhibiting a field hysteresis.The discussion is based on the two-level model and molecular field approximation.
Trvalý link: http://hdl.handle.net/11104/0208132