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Giant reversible magnetocaloric effect in ErMn2Si2 compound with a second order magnetic phase transition

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6 Author(s)
Li, Lingwei ; Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, China ; Nishimura, Katsuhiko ; Hutchison, Wayne D. ; Qian, Zhenghong
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The magnetic properties and magnetocaloric effect (MCE) in the ternary intermetallic compound ErMn2Si2 have been studied by magnetization and heat capacity measurements. A giant reversible MCE has been observed, accompanied by a second order magnetic phase transition from paramagnetic to ferromagnetic at ∼4.5 K. Under a field change of 5 T, the maximum value of magnetic entropy change (-ΔSMmax) is 25.2 J kg-1 K-1 with no thermal and field hysteresis loss, and the corresponding maximum value of adiabatic temperature change (ΔTadmax) is 12.9 K. Particularly, the values of -ΔSMmax and ΔTadmax reached 20.0 J kg-1 K-1 and 5.4 K for a low field change of 2 T, respectively. The present results indicate that the ErMn2Si2 compound is an attractive candidate for low temperature magnetic refrigeration.

Published in:

Applied Physics Letters  (Volume:100 ,  Issue: 15 )

Date of Publication:

Apr 2012

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