Abstract
Magnetic and magnetocaloric properties of ErAlO3 single crystal were investigated. Magnetization of ErAlO3 shows obvious anisotropy when magnetic field is applied along the a, b and c axes, which leads to large anisotropic magnetic entropy change. In particular, large rotating field entropy change from the b to c axis within the bc plane is obtained and reaches 9.7 J/kg K at 14 K in a field of 5 T. This suggests the possibility of using ErAlO3 single crystal for magnetic refrigerators by rotating its magnetization vector rather than moving it in and out of the magnet.
Highlights
The consequent changes in the entropy and temperature of a material with magnetic field were known as magnetocaloric effect (MCE).[1]
We report the anisotropic magnetic properties and magnetic entropy change for ErAlO3 single crystal
We only focus on ∆SR from the b to c axis within the bc plane due to the larger difference of ∆S between the b and c directions than that between the a and c directions
Summary
The consequent changes in the entropy and temperature of a material with magnetic field were known as magnetocaloric effect (MCE).[1] W. Kimura et al reported that ErAlO3 single crystal shows diverse magnetic entropy changes (∆S, one important parameter for characterizing the magnitude of MCE) along the a, b, c axes, respectively.[18] In this work, we report the anisotropic magnetic properties and magnetic entropy change for ErAlO3 single crystal. Based on these results, we further determine its optimal rotating field MCE. For a field of 5 T, the rotating field entropy change from the b to c axis reaches a large value of 9.7 J/kg K at 14 K
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