Current-induced domain-wall motion in U-shaped permalloy wire

Author

Tsai, J.L. ; Yao, Y.D. ; Lee, S.F. ; Liou, Y. ; Chen, T.Y. ; Cheng, K.W.

Author_Institution

Dept. of Mater. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan

Volume

41

Issue

10

fYear

2005

Firstpage

2627

Lastpage

2629

Abstract

The current-induced domain-wall motion has been observed by using a U-shaped permalloy wire. We observed two magnetic states in a U-shaped pattern. One is the vortex domain wall at the center of semicircular arc region of the U-shaped pattern, and the other is the continuous magnetic state without the domain wall in between. In general, the current density of the order of ∼10⁷ A/cm² is needed to drive a magnetic domain wall. In this paper, the critical current for domain-wall motion increases as the bias field increases. The bias field means the field deviated from the switching field of the wire.

Keywords

Permalloy; critical currents; current density; magnetic domain walls; magnetisation reversal; wires; U-shaped pattern; U-shaped permalloy wire; bias field; continuous magnetic state; current density; domain-wall motion; magnetic domain wall; semicircular arc region; vortex domain wall; Anisotropic magnetoresistance; Giant magnetoresistance; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic separation; Magnetization; Perpendicular magnetic anisotropy; Pulse measurements; Wire; Current density; vortex domain wall;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.854815

Filename

1519069