Low field giant magnetocaloric effect in RNiBC (R Er and Gd) and enhanced refrigerant capacity in its composite materials

Lingwei Li*, Michiaki Kadonaga, Dexuan Huo, Zhenghong Qian, Takahiro Namiki, Katsuhiko Nishimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

98 Scopus citations

Abstract

The magnetic properties and magnetocaloric effect (MCE) in RNiBC (R Er and Gd) compounds and its composite materials were investigated. A giant low field reversible MCE was observed in RNiBC compounds at 5 and 13 K for R Er and Gd, respectively. Under a relative low field change of 2 T, the maximum values of magnetic entropy change (-ΔS M max) reach 17.1 and 9.3 J/kg K for R Er and Gd, respectively. A table-like MCE in the temperature of 4-20 K and enhanced refrigerant capacity (RC) were found in the ErNiBC-GdNiBC composite materials. For the magnetic field changes of 1 T and 2 T, the maximum improvement of RC reach 31% (19%) and 30% (8%), in comparison with that of individual compound ErNiBC (GdNiBC), respectively. The excellent MCE properties make the RNiBC composite materials attractive for low temperature magnetic refrigeration.

Original languageEnglish
Article number122401
JournalApplied Physics Letters
Volume101
Issue number12
DOIs
StatePublished - 2012/09/17

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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