Direct measurements of inverse magnetocaloric effects in metamagnetic shape-memory alloy NiCoMnIn

T. Kihara, X. Xu, W. Ito, R. Kainuma, M. Tokunaga

研究成果: Article査読

89 被引用数 (Scopus)

抄録

To clarify the electronic, lattice, and magnetic contribution to the inverse magnetocaloric effect (IMCE) in the metamagnetic shape-memory alloy Ni45Co5Mn50-xInx, magnetization, magnetocaloric effect, and specific-heat measurements were carried out in a wide range of fields and temperatures. The IMCEs of Ni45Co5Mn36.7In13.3 were directly measured as adiabatic temperature changes in pulsed fields of up to 15 T. A maximum temperature decrease of -12.8 K was observed. The low-temperature specific heats in both the austenitic and the martensitic phases of Ni45Co5Mn36.5In13.5 were measured by using steady fields. Through analyses of the data, the entropy changes in charge (1.2 J/kg K), spin (-29 J/kg K), and lattice (51 J/kg K) sectors were individually evaluated. The result demonstrates the dominant role of the lattice sector in inverse MCEs in this material.

本文言語English
論文番号214409
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
90
21
DOI
出版ステータスPublished - 2014 12 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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