Influence of demagnetization effect on the kinetics of the itinerant electron metamagnetic transition in magnetic refrigerant La(Fe 0.88Si0.12)13

Hitomi Yako, Shun Fujieda, Asaya Fujita, Kazuaki Fukamichi

研究成果: Article査読

17 被引用数 (Scopus)

抄録

Influence of demagnetization effect on the kinetics of the itinerant electron metamagnetic (IEM) transition in magnetic refrigerant La(Fe 0.88Si0.12)13 has been investigated by both the static and time-dependent magnetization measurements. From the magnetization measurement by changing the field direction against the longitudinal direction of specimen, the critical magnetic field μ0HC for the IEM transition becomes larger in the setup with a higher demagnetization coefficient. The time dependence of magnetization under constant magnetic field indicates that the progress of both the onset and offset of the IEM transition is completed in the condition with smaller demagnetization effect, meanwhile the arrest of progress is elicited by the larger demagnetization effect. In addition, the Johnson-Mehl-Avrami analysis leads to a 2-D-like growth of the ferromagnetic phase in the paramagnetic matrix. These results reveal that the nucleation and growth process of the IEM transition is affected by the demagnetization effect.

本文言語English
論文番号6028238
ページ(範囲)2482-2485
ページ数4
ジャーナルIEEE Transactions on Magnetics
47
10
DOI
出版ステータスPublished - 2011 10

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学

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