Large reversible magnetocaloric effect in spinel MnV2O4 with minimal Al substitution |
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| Authors: | X. Luo W.J. LuZ.H. Huang X.B. HuL. Hu X.B. ZhuZ.R. Yang W.H. SongJ.M. Dai Y.P. Sun |
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| Affiliation: | a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
b High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China |
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| Abstract: | Magnetocaloric effect of MnV1.95Al0.05O4 was studied by the magnetization and heat capacity measurements. MnV1.95Al0.05O4 is a cubic spinel structure with ferromagnetism of second order in nature and performs reversible magnetic entropy around the magnetic transition temperature. The large magnetic entropy changes −ΔSM∼5.2 and 8.2 J/kg K and the adiabatic temperature changes ΔTad∼1.5 and 2.6 K are revealed for the magnetic field changes of 2 and 4 T near the Curie temperature (TC) of 59.6 K, respectively. The relative cooling power (RCP) are about 82.2 and 177.2 J/kg K for magnetic field changes 2 and 4 T, respectively. Compared with the parent compound, although the −ΔSM and ΔTad become smaller, the refrigeration working temperature span and the RCP have been improved. |
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| Keywords: | Spinel vanadate Reversible magnetocaloric effect Substitution effect |
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