Current-Induced Domain Wall Motion in TbFeCo Wires With Perpendicular Magnetic Anisotropy

Author

Li, Songtian ; Nakamura, Hajime ; Kanazawa, Taichi ; Liu, Xiaoxi ; Morisako, Akimistu

Author_Institution

Spin Device Technol. Center, Shinshu Univ., Nagano, Japan

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1695

Lastpage

1698

Abstract

Current-induced domain wall motion in TbFeCo wires with perpendicular magnetic anisotropy has been directly observed by Kerr microscope. The moving direction of domain wall is opposite to the current direction, which is in agreement with the spin torque transfer theory. The critical current density found in TbFeCo is lower than 10⁷ A/cm², which is an order smaller than in other metallic materials reported so far. In addition, the critical current density gets increased with the increase of the pinning potential in TbFeCo thin film, which is also consistent with the theoretical prediction for a pinning dominant mechanism.

Keywords

cobalt alloys; iron alloys; magnetic domain walls; magnetic thin films; perpendicular magnetic anisotropy; terbium alloys; Kerr microscope; TbFeCo; critical current density; current-induced domain wall motion; perpendicular magnetic anisotropy; pinning potential; spin torque transfer; thin film; Anisotropic magnetoresistance; Bars; Critical current density; Current density; Magnetic domain walls; Magnetic materials; Magnetoelectronics; Perpendicular magnetic anisotropy; Torque; Wires; Current-induced domain wall motion; TbFeCo; perpendicular magnetic anisotropy; pinning field;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2042576

Filename

5467509