Large magnetic entropy change and adiabatic temperature rise of a Gd 55Al20Co20Ni5 bulk metallic glass

L. Xia, M. B. Tang, Kang Cheung Chan, Y. D. Dong

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Gd55Al20Co20Ni5 bulk metallic glass (BMG) was synthesized by minor Ni substitution for Co in the Gd 55Al20Co25 BMG in which excellent glass forming ability (GFA) and magneto-caloric effect were reported previously. The Gd 55Al20Ni20Co5 amorphous rod has a similar GFA to the Gd55Al20Co25 BMG but exhibits better magnetic properties. The peak value of magnetic entropy change (-ΔSmpeak) of the Gd55Al 20Co20Ni5 BMG is 9.8 Jkg-1 K -1. The field dependence of -ΔSmpeak follows a -ΔSmpeak-H0.85 relationship. The adiabatic temperature rise of the rod is 4.74K under 5 T and is larger than of other BMGs previously reported. The improved magnetic properties were supposed to be induced by the enhanced interaction between 4f electron in the rare-earth and 3d electron in the transition metal elements by means of a minor Ni substitution for Co.
Original languageEnglish
Article number223904
JournalJournal of Applied Physics
Issue number22
Publication statusPublished - 14 Jun 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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