Great magnetic entropy change in La(Fe, M)13 (M=Si, Al) with Co doping

Feng Xia Hu*, Bao Gen Shen, Ji Rong Sun, Xi Xiang Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

149 Scopus citations

Abstract

Very large magnetic entropy change ΔSM, which originates from a fully reversible second-order transition at Curie temperature TC, has been discovered in compounds La(Fe, A1)13, La(Fe, Al) 13 and those with Co doping. The maximum change ΔSM≈19J·kg-1·K-1, achieved in LaFe11.4Si1.6 at 209K upon a 5T magnetic field change, exceeds that of Gd by more than a factor of 2. The TC of the Co-doped compounds shifts to higher temperatures. ΔSM still has a considerable large magnitude near room temperature. The phenomena of very large ΔSM, convenience of adjustment of TC, and also the superiority of low cost, strongly suggest that the compounds La(Fe, M)13 (M=Si, Al) with Co doping are suitable candidates for magnetic refrigerants at high temperatures.

Original languageEnglish (US)
Pages (from-to)550-553
Number of pages4
JournalChinese Physics
Volume9
Issue number7
DOIs
StatePublished - Jul 2000
Externally publishedYes

Keywords

  • Magnetic entropy change
  • NaZn-type compounds

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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