Improvement of low-field magnetic entropy change by increasing Fe concentration in solid-state reactive sintered La(FexSi 1-x)13

A. Fujita, Y. Nakayama, M. Kano, D. Matsunami

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Solid-state reactive sintering has been carried out in order to fabricate La(FexSi1-x)13 specimens with a higher Fe concentration. No trace of α-Fe was confirmed for x = 0.90, while a residual amount of α-Fe less than 0.6 vol.% was observed for x = 0.91. The net value of the Fe concentration for the La(Fe xSi1-x) phase in both specimens is confirmed to be close to the nominal value based on the energy dispersion X-ray analyses. Magnetic entropy changes ΔSM = -23 and -24 J/kg K is obtained even under the low field change of 0.6 T for x = 0.90 and 0.91, respectively. Therefore, the low field response of ΔSM is improved owing to an increase in the net value of the Fe concentration in La(FexSi1-x) by the sintering method.

Original languageEnglish
Pages (from-to)158-161
Number of pages4
JournalJournal of Alloys and Compounds
Volume601
DOIs
Publication statusPublished - 2014 Jul 15

Keywords

  • Magnetic measurements
  • Magnetocaloric
  • Microstructure
  • Phase transitions
  • Sintering
  • Transition metal alloys and compounds

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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