Reduction of hysteresis loss in itinerant-electron metamagnetic transition of la1-zCez(FexMnySi 1-x-y)13 magnetic refrigerants at low temperatures

Shun Fujieda, Asaya Fujita, Kazuaki Fukamichi

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1 Citation (Scopus)

Abstract

Since La0.75Ce0.25(Fe0.85Mn 0.03Si0.12)13 itinerant-electron metamagnet exhibits large magnetocaloric effects at low temperatures because of the itinerant-electron metamagnetic (IEM) transition, the reduction of hysteresis loss Eh estimated from the enclosed area between the ascendant and descendant magnetization has been investigated. We have found that Eh associated with the IEM transition of La0.75Ce 0.25(Fe0.83Mn0.03Si0.12) 13 is remarkably reduced from 78 to 3J/kg by a slight adjustment of compositions, that is, the increase of the Ce concentration up to z = 0.35 and the decrease of the Fe concentration down to x = 0.84. What is important is that such improvement is achieved without a striking decrease of the isothermal magnetic entropy change ΔSm at low temperatures.

Original languageEnglish
Pages (from-to)1994-1997
Number of pages4
JournalMaterials Transactions
Volume49
Issue number9
DOIs
Publication statusPublished - 2008 Sep

Keywords

  • First-order transition
  • Isothermal magnetic entropy change
  • Magnetic refrigeration
  • Magnetocaloric effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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