Effect of Joule heating in current-driven domain wall motion

被引：148

作者：

Yamaguchi, A

Nasu, S

Tanigawa, H

Ono, T

Miyake, K

Mibu, K

Shinjo, T

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[2] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[3] Tohoku Univ, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

[4] Kyoto Univ, Res Ctr Low Temp & Mat Sci, Uji, Kyoto 6110011, Japan

[5] Int Inst Adv Studies, Kizu 6190225, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 01期

基金：

日本学术振兴会;

关键词：

D O I：

10.1063/1.1847714

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It was found that high current density needed for the current-driven domain wall motion results in the Joule heating of the sample. The sample temperature, when the current-driven domain wall motion occurred, was estimated by measuring the sample resistance during the application of a pulsed current. The sample temperature was 750 K for the threshold current density of 6.7x10(11) A/m(2) in a 10-nm-thick Ni81Fe19 wire with a width of 240 nm on thermally oxidized silicon substrate. The temperature was raised to 830 K for the current density of 7.5x10(11) A/m(2), which is very close to the Curie temperature of bulk Ni81Fe19. When the current density exceeded 7.5x10(11) A/m(2), an appearance of a multidomain structure in the wire was observed by magnetic force microscopy, suggesting that the sample temperature exceeded the Curie temperature. (C) 2005 American Institute of Physics.

引用

页码：012511 / 1

页数：3

共 11 条

[1] OBSERVATION OF S-D EXCHANGE FORCE BETWEEN DOMAIN-WALLS AND ELECTRIC-CURRENT IN VERY THIN PERMALLOY-FILMS [J].