Giant magnetocaloric effect and soft-mode magneto-structural phase transition in MnAs

J. D. Zou, H. Wada, B. G. Shen, J. R. Sun, W. Li

研究成果: ジャーナルへの寄稿学術誌査読

29 被引用数 (Scopus)

抄録

Maxwell relation and mean-field approximation are chosen to estimate the total entropy change and the magnetic entropy change, respectively. The experimental results are exactly consonant with the theoretical results. Consequently, the magnetic entropy changes make up the majority of the total entropy change, and the lattice entropy changes are small. The giant magnetocaloric effect in MnAs is clarified. According to thermodynamics discussion, the modulus of compression and the stress at TC decrease dramatically. Therefore, the magneto-structural phase transition in MnAs is a kind of soft mode.

本文言語英語
論文番号47002
ジャーナルEPL
81
4
DOI
出版ステータス出版済み - 2月 1 2008

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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