Large thermal stability independent of critical current of domain wall motion in Co/Ni nanowires with step pinning sites

Shunsuke Fukami, Tetsuhiro Suzuki, Kiyokazu Nagahara, Norikazu Ohshima, Nobuyuki Ishiwata

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The relation between critical current, critical field, and thermal stability of domain wall (DW) trapped at step pinning sites was studied using Co/Ni nanowires with perpendicular magnetic anisotropy (PMA). A sharp step structure was fabricated, which increased the critical field of DW motion, while the critical current was independent of the critical field. Also, the derived thermal stability (ΔE/ kB T) for the step samples was much more than 60. These results indicate that the DW motion in PMA nanowires has potential for memory devices with both a small driving current and large thermal stability.

Original languageEnglish
Article number113914
JournalJournal of Applied Physics
Volume108
Issue number11
DOIs
Publication statusPublished - 2010 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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