Magnetization process of high anisotropy CoPt nanosized dots

N. Kikuchi, R. Murillo, J. C. Lodder, K. Mitsuzuka, T. Shimatsu

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Dot arrays with diameter ranging from 80 to 245 nm are made of Co 80 Pt20 films with large perpendicular anisotropy. Magnetic properties are investigated by detecting the anomalous Hall effect. The all arrays show angular dependence of remanent coercivity similar to coherent rotation. The result shows that reversal process is independent of dot diameter. The energy barrier height of magnetization reversal is estimated as 1.0 × 10-10 erg for the array consists of 140-nm-diameter dots. From the energy value, the switching volume is estimated as equivalent to the volume of a physical grain in the film. The results indicate that the reversal process starts from a nucleation of a "reversed grain"followed by propagation process.

本文言語English
ページ(範囲)3613-3615
ページ数3
ジャーナルIEEE Transactions on Magnetics
41
10
DOI
出版ステータスPublished - 2005 10月

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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