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Nanto, Dwi,Seong-Cho Yu,Suhk-Kun Oh,Chebotaev, Nikolay,Telegin, Andrey IEEE 2014 IEEE transactions on magnetics Vol.50 No.4
<P>Manganite perovskite with A-site deficiency has been synthesized by a solid-state reaction technique. Our work does not support a general view that A-site deficiency gives a decrease on Curie temperature. The Curie temperature of (La<SUB>0.8</SUB>Ca<SUB>0.2</SUB>)<SUB>0.975</SUB>MnO<SUB>3.01</SUB> is 188 K with maximum entropy change -ΔSM <SUB>max</SUB> = 1.6 J·kg<SUP>-1</SUP>·K<SUP>-1</SUP> and refrigerant capacity (RC) of 27 J/kg under an applied field of 10 kOe. The nonstoichiometric (La<SUB>0.8</SUB>Ca<SUB>0.2</SUB>)<SUB>0.975</SUB>MnO<SUB>3.01</SUB> may offer a wider temperature span of ~240% compared with those nanocrystalline La<SUB>0.8</SUB>Ca<SUB>0.2</SUB>MnO<SUB>3.01</SUB> that have similar RC, which has been reported by others.</P>