Magnetic entropy change in La(Fe0.98Co0.02)11.7Al1.3

Feng Xia Hu, Bao Gen Shen, Ji Rong Sun, Zhao Hua Cheng, Xixiang Zhang

Research output: Contribution to journalArticlepeer-review

101 Scopus citations

Abstract

Magnetization of compound La(Fe0.98Co0.02)11.7Al1.3 was measured carefully as functions of temperature and applied field around its Curie temperature of approximately 198 K. Magnetic entropy change |ΔS|, allowing estimation of the magnetocaloric effect (MCE), was determined based on thermodynamic Maxwell's relation. The achieved magnitude of |ΔS| reaches 10.6 J kg-1 K-1 under a field of 5 T. The considerable entropy change is believed to be due to the high magnetization and the sharp change in magnetization at TC. It is found that the magnetic phase transition is completely reversible in temperature, indicating a nature of second-order phase transition.

Original languageEnglish (US)
JournalJournal of Physics Condensed Matter
Volume12
Issue number46
DOIs
StatePublished - Nov 20 2000

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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