Effect of Joule heating in current-driven domain wall motion

A. Yamaguchi, S. Nasu, H. Tanigawa, T. Ono, K. Miyake, K. Mibu, T. Shinjo

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134 Citations (Scopus)

Abstract

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. 7× 1011 A m2 in a 10-nm-thick Ni81 Fe19 wire with a width of 240 nm on thermally oxidized silicon substrate. The temperature was raised to 830 K for the current density of 7.5× 1011 A m2, which is very close to the Curie temperature of bulk Ni81 Fe19. When the current density exceeded 7.5× 1011 A m2, an appearance of a multidomain structure in the wire was observed by magnetic force microscopy, suggesting that the sample temperature exceeded the Curie temperature.

Original languageEnglish
Article number012511
Pages (from-to)012511-1-012511-3
JournalApplied Physics Letters
Volume86
Issue number1
DOIs
Publication statusPublished - 2005 Jan

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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