Dot size dependence of magnetic properties in microfabricated L1 0-FePt (001) and L10-FePt (110) dot arrays

T. Seki, T. Shima, K. Yakushiji, K. Takanashi, G. Q. Li, S. Ishio

研究成果: Article査読

31 被引用数 (Scopus)


L10-FePt (001) and L10-FePt (110) dot arrays with well-defined geometry were fabricated through the use of electron beam lithography and Ar ion etching. The lateral size of dots was varied in the range from 0.2×0.2 to 5×5 μm2. Coercivity (H c) for the perpendicularly magnetized FePt (001) dots increases with decreasing the dot size. In the case of the FePt (110) dots with in-plane magnetization, on the other hand, the dot size dependence of Hc is completely different from that for FePt (001) dots: Hc shows a slight decrease as the dot size decreases. After annealing at 600°C, the values of Hc for both FePt (001) and FePt (110) dots are remarkably enhanced although the dot size dependence shows similar behavior to that before annealing. The magnetization reversal for all the dots occurs through the nucleation of reversed domains and subsequent domain wall propagation.

ジャーナルJournal of Applied Physics
出版ステータスPublished - 2006

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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