Thermally and field-driven spin-state transitions in (Pr1−yYy)0.7Ca0.3CoO3 | Zendy

M. Maryško | Zendy; Z. Jirák | Zendy; K. Knı́žek | Zendy; P. Novák | Zendy; J. Hejtmánek | Zendy; Tomoyuki Naito | Zendy; Hiroko Sasaki | Zendy; Hiroyuki Fujishiro | Zendy

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Thermally and field-driven spin-state transitions in (Pr1−yYy)0.7Ca0.3CoO3

Author(s) -

M. Maryško,

Z. Jirák,

K. Knı́žek,

P. Novák,

J. Hejtmánek,

Tomoyuki Naito,

Hiroko Sasaki,

Hiroyuki Fujishiro

Publication year - 2011

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3559485

Subject(s) - condensed matter physics , magnetization , physics , hysteresis , field (mathematics) , isothermal process , magnetic field , spin (aerodynamics) , thermodynamics , quantum mechanics , mathematics , pure mathematics

The first-order character of the transition from the low-to-intermediate spin state in the system (Pr1−yYy)0.7Ca0.3CoO3 (y = 0.075–0.15) has been verified by magnetization measurements. For y = 0.075, the transition manifests itself in χ(T) steps at temperatures depending on external fields. In this case, isothermal measurements show a field-driven transition exhibiting a field hysteresis. The entropy contribution is evaluated and discussed. Qualitative analysis based on a two-level model suggests that the observed influence of the magnetic field can be explained only by assuming the presence of exchange interactions

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