Switching field distribution and magnetization reversal process of FePt dot patterns

被引：6

作者：

Ishio, S. ^{[1
]}

Takahashi, S. ^{[1
]}

Hasegawa, T. ^{[1
]}

Arakawa, A. ^{[1
]}

Sasaki, H. ^{[1
]}

Yan, Z. ^{[2
]}

Liu, X. ^{[2
]}

Kondo, Y. ^{[3
]}

Yamane, H. ^{[3
]}

Ariake, J. ^{[3
]}

Suzuki, M. ^{[4
]}

Kawamura, N. ^{[4
]}

Mizumaki, M. ^{[4
]}

机构：

[1] Akita Univ, Dept Mat Sci & Engn, Akita 0108502, Japan

[2] Akita Univ, Venture Business Lab, Akita 0108502, Japan

[3] Akita Prefectural Res & Dev Ctr, Akita 0101623, Japan

[4] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 360卷

基金：

日本科学技术振兴机构;

关键词：

Fe Pt; Dot pattern; Magnetization reversal; Switching field; Coercivity; ANISOTROPY; DEPENDENCE; FILMS;

D O I：

10.1016/j.jmmm.2014.02.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fabrication of FePt nanodots with a high structural quality and the control of their switching fields are key issues in realizing high density bit pattern recording. We have prepared FePt dot patterns for dots with 15-300 nm diameters by electron beam lithography and re-annealing, and studied the relation between magnetization reversal process and structure of FePt nanodots. The switching field (H) of dot patterns re-annealed at 710 degrees C for 240 min showed a bimodal distribution, where a higher peak was found at 5-6 T, and a lower peak was found at similar to 2 T. It was revealed by cross-sectional TOM analysis that the structure of dots in the pattern can be classified into two groups. One group has a high degree of order with well-defined 100 11 crystalline growth, and the other group includes structurally-disturbed dots like [1 1 11 growth and twin crystals. This structural inhomogeneity causes the magnetic switching field distribution observed. (C) 2014 Elsevier By. All rights reserved.

引用

页码：205 / 210

页数：6

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