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 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.