Effect of Dy, Ho, and Er substitution on the magnetocaloric properties of Gd-Co-Al-Y high entropy bulk metallic glasses

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • C.M. Pang
  • L. Chen
  • H. Xu
  • W. Guo
  • Z.W. Lv
  • J.T. Huo
  • M.J. Cai
  • B.L. Shen
  • C.C. Yuan

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number154101
Journal / PublicationJournal of Alloys and Compounds
Volume827
Online published31 Jan 2020
Publication statusPublished - 25 Jun 2020

Abstract

Glass-forming ability, thermal stability and magnetocaloric properties of Gd25Co25Al25Y25 and Gd25Co25Al25Y15RE10 (RE = Dy, Ho, and Er) high entropy metallic glasses are evaluated. With the substitution of Y by adjacent heavy rare earth elements, i.e., Dy, Ho, or Er, the critical dimension (Dc), the width of the supercooled liquid region, magnetic entropy changes (|ΔSM|) and refrigeration capacity (RC) increase obviously. However, the magnetic transition temperature (TC) almost keeps constant around 40 K, which may be attributed to the exchange interaction between Y and transition metal or other rare earth elements. Among resulting Gd25Co25Al25Y15RE10 metallic glasses, the peak values of |ΔSM| and RC can be improved from 6.76 to 7.35 Jkg−1K−1and 424 to 488 Jkg-1 when substituting Dy by Ho. This makes Gd25Co25Al25Y15Ho10 as an attractive candidate for magnetic refrigerants in hydrogen liquefaction temperature range.

Research Area(s)

  • Glass-forming ability, High-entropy alloys, Magnetocaloric effect, Metallic glasses

Citation Format(s)

Effect of Dy, Ho, and Er substitution on the magnetocaloric properties of Gd-Co-Al-Y high entropy bulk metallic glasses. / Pang, C.M.; Chen, L.; Xu, H.; Guo, W.; Lv, Z.W.; Huo, J.T.; Cai, M.J.; Shen, B.L.; Wang, X.L.; Yuan, C.C.

In: Journal of Alloys and Compounds, Vol. 827, 154101, 25.06.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal