Large magnetic entropy change in compound LaFe11.44Al1.56 with two magnetic phase transitions

Feng Xia Hu*, Bao Gen Shen, Ji Rong Sun, A. B. Pakhomov, C. Y. Wong, Xixiang Zhang, Shao Ying Zhang, Guang Jun Wang, Zhao Hua Cheng

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

26 Scopus citations

Abstract

It is shown that Fe-based compound LaFe11.44 Al1.56 with cubic NaZn13-type structure undergoes both a second order and a first order phase transitions. In small fields, it orders antiferromagnetically at TN = 186 K, and ferromagnetism is established at T0 ≈ 127 K. At T > T0, field-induced metamagnetic transition between the two phases is observed in larger fields. The magnetic entropy change |δS|, estimated as a function of temperature from magnetization curves, has large values near the first-order transition. Metamagnetic transformation leads to an asymmetric broadening of the maximum with increasing field. This compound may be useful for magnetic refrigeration.

Original languageEnglish (US)
Pages (from-to)2328-2330
Number of pages3
JournalIEEE Transactions on Magnetics
Volume37
Issue number4 I
DOIs
StatePublished - Jul 1 2001
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: Jan 7 2001Jan 11 2001

Keywords

  • Magnetocaloric effect
  • Metamagnetic transition
  • NaZn-type compounds

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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