Extremely large magnetic entropy change of MnAs1-xSbx near room temperature

Hirofumi Wada, Kentaro Taniguchi, Yuji Tanabe

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Magnetization of MnAs1-xSbx was measured as functions of temperature and magnetic field for 0 ≤ x ≤ 0.4. The entropy change caused by a magnetic field, ΔSmag, was estimated on the basis of the Maxwell relation. The ΔSmag for 0 ≤ x ≤ 0.3 in a field change of 5T reaches 25-30 J/K kg, which exceeds that of other materials by a factor of 2-4. The substitution of Sb for As can tune the Curie temperature between 230 K and 315 K without any significant reduction of ΔSmag. The large ΔSmag originates in a paramagnetic ferromagnetic transition induced by a magnetic field. These results indicate that MnAs1-xSbx is a promising material for a working substance in magne refrigeration near room temperature.

Original languageEnglish
Pages (from-to)73-77
Number of pages5
JournalMaterials Transactions
Volume43
Issue number1
DOIs
Publication statusPublished - Jan 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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