Structural origin of hysteresis for hexagonal (Mn,Fe)2(P,Si) magneto-caloric compound

Xue Fei Miao, Hossein Sepehri-Amin, Kazuhiro Hono

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We performed in-situ transmission electron microscope observations on the unconventional ferromagnetic transition in hexagonal (Mn,Fe)2(P,Si) magneto-caloric compounds in order to understand the origin of the large thermal hysteresis that is detrimental to magnetic refrigeration. We find that the ferromagnetic transition is coupled to a martensitic-like transformation. Although crystal structure is the same for both paramagnetic (PM) and ferromagnetic (FM) phases, large lattice distortion occurs during the PM-FM transition, which induces energy barrier of about 13.6 kJ/mol. Supercooling or superheating is therefore needed to overcome the energy barrier, which causes the thermal hysteresis for the ferromagnetic transition.

本文言語English
ページ(範囲)96-99
ページ数4
ジャーナルScripta Materialia
138
DOI
出版ステータスPublished - 2017 9
外部発表はい

ASJC Scopus subject areas

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

フィンガープリント 「Structural origin of hysteresis for hexagonal (Mn,Fe)<sub>2</sub>(P,Si) magneto-caloric compound」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル