Relative cooling power of La(FexSi1-x)13 after controlling the Curie temperature by hydrogenation and partial substitution of Ce

A. Fujita, S. Fujieda, K. Fukamichi

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23 Citations (Scopus)

Abstract

The relative cooling power (RCP) was evaluated in the itinerant-electron metamagnetic (IEM) La(FexSi1-x)13 after controlling TC by hydrogenation and partial substitution of Ce for La. It is found that RCP is related to the temperature dependence of the IEM transition field BC and the change in the magnetization ΔM at the first-order Curie temperature TC. Since dBC/dT is irrelevant to TC, ΔM dominates the magnitude of RCP. The change of ΔM after controlling TC is caused by stability of the ferromagnetic state because of the increase of the Fe-Fe distance due to hydrogenation and by the hybridization of electron bands between Ce and Fe in the partially substituted system.

Original languageEnglish
Pages (from-to)e1006-e1007
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 3
DOIs
Publication statusPublished - 2007 Mar 1

Keywords

  • Itinerant electron metamagnetic transition
  • Magnetocaloric effect
  • Relative cooling power

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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