Magneto-Optical Study of the Surface Reversal Process in Amorphous Glass-Coated Microwires With Positive Magnetostriction

被引：15

作者：

Richter, Kornel ^{[1
,2
]}

Thiaville, Andre ^{[1
]}

Varga, Rastislav ^{[2
]}

机构：

[1] Univ Paris 11, Lab Phys Solides, F-91400 Orsay, France

[2] Pavol Jozef Safarik Univ, Dept Phys, Kosice 04154, Slovakia

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2014年 / 50卷 / 04期

关键词：

Domain wall dynamics; magneto-optical microscopy; microwires; surface domain structure; DOMAIN-STRUCTURE; DYNAMICS;

D O I：

10.1109/TMAG.2013.2286632

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Amorphous glass-coated microwires are well known by high domain wall velocities that reach up to 15 km/s. Previous works have shown that such fast domain wall dynamics can be manipulated by properly selected conditions of thermal annealing. Along with the magnetic anisotropy, the domain wall velocity is strongly influenced by surface shell of domains too. Here, the magneto-optical study of the surface reversal process in microwire is carried out by magneto-optical Kerr effect (MOKE) microscopy. It is shown that the nonplanar surface of the cylindrical samples gives rise to a complex MOKE. Trapping the domain wall in a potential, well confirmed the inclined structure of the domain wall. Such inclination can be found partially responsible for apparent high domain wall velocities measured by Sixtus-Tonks method in microwires.

引用

页数：4

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