Anomalous temperature dependence of coercivity at low temperature in L10 FePt thin films

Parmanand Sharma, Neelam Kaushik, Akihiro Makino, Akihisa Inoue

研究成果: Article査読

6 被引用数 (Scopus)

抄録

L10 FePt thin films of varying composition were epitaxially grown at different substrate temperatures (400-600° C) on MgO (100) single crystal substrate by magnetron co-sputtering technique. Processing conditions were optimized to produce films with either (002) or a mixture of (002) and (200) crystallites. Effects of two different crystallographic orientations, i.e., (200) and (002) on the magnetic properties of L10 FePt were studied. Anomalous temperature variation of coercivity (Hc) (i.e., a decrease in Hc with decreasing temperature) was observed at low temperatures for the films having comparable intensities of (200) and (002) diffraction peaks in the X-ray diffraction patterns. We have identified the cause for this anomalous behavior in Hc. Strong inter-particle exchange interaction between (200) and (002) crystallites is shown to be responsible for the anomalous temperature variation in Hc.

本文言語English
論文番号6027848
ページ(範囲)4394-4397
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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