Unusual oxidation states give reversible room temperature magnetocaloric effect on perovskite-related oxides SrFe0.5CO0.5O3

The magnetic properties and the magnetocaloric effect are presented for the perovskite-related oxide SrFe0.5Co0.5O3 prepared using electrochemical oxidation. SrFe0.5Co0.5O3 exhibits a second order paramagnetic-ferromagnetic transition close to room temperature (TC=330 K). The maximal magnetic entrop...

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Bibliographic Details
Published inJournal of solid state chemistry Vol. 184; no. 12; pp. 3228 - 3231
Main Authors YIN, C, LIU, Q, DECOURT, R, POLLET, M, GAUDIN, E, TOULEMONDE, O
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier 01.12.2011
Subjects
Chemical Sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Magnetocaloric effect, magnetic cooling
Material chemistry
Physics
Temperature dependence
Second order
Paramagnetism
Perovskites
Co
O
Valence
Magnetocaloric effects
Temperature effects
Magnetocaloric effect
SrFe
Ferromagnetism
Oxidation
Ferromagnetic-paramagnetic transitions
Electrochemical oxidation
Magnetic properties
Solid solution
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Summary:The magnetic properties and the magnetocaloric effect are presented for the perovskite-related oxide SrFe0.5Co0.5O3 prepared using electrochemical oxidation. SrFe0.5Co0.5O3 exhibits a second order paramagnetic-ferromagnetic transition close to room temperature (TC=330 K). The maximal magnetic entropy change ΔSMMax , the maximal adiabatic temperature change ΔTad and the refrigerant capacity are found to be equal to respectively 4.0 J/kgK, 1.8 K and 258 J/kg while raising the B-field change from 0 to 5 T.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2011.10.002