Giant reversible magnetocaloric effect in ErMn 2Si 2 compound with a second order magnetic phase transition

Lingwei Li*, Katsuhiko Nishimura, Wayne D. Hutchison, Zhenghong Qian, Dexuan Huo, Takahiro Namiki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

205 Scopus citations

Abstract

The magnetic properties and magnetocaloric effect (MCE) in the ternary intermetallic compound ErMn 2Si 2 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 (-δS M max) is 25.2 J kg -1 K -1 with no thermal and field hysteresis loss, and the corresponding maximum value of adiabatic temperature change (δT ad max) is 12.9 K. Particularly, the values of -δS M max and δT ad max 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 ErMn 2Si 2 compound is an attractive candidate for low temperature magnetic refrigeration.

Original languageEnglish
Article number152403
JournalApplied Physics Letters
Volume100
Issue number15
DOIs
StatePublished - 2012/04/09

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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