Relation between critical current of domain wall motion and wire dimension in perpendicularly magnetized Co/Ni nanowires

S. Fukami, Y. Nakatani, T. Suzuki, K. Nagahara, N. Ohshima, N. Ishiwata

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We investigated the relation between critical current of domain wall motion and wire dimension by using perpendicularly magnetized Co/Ni nanowires with different widths and thicknesses. The critical current, Ic, became less than 0.2 mA when w<100 nm, suggesting that magnetic random access memory with domain wall motion can replace conventional embedded memories. In addition, in agreement with theory, the critical current density, jc, decreased as wire width decreased and became much less than 5× 10 7 A/ cm2 when w<100 nm. We also performed a micromagnetic simulation and obtained good agreement between the experiment and simulation, although a few discrepancies were found.

Original languageEnglish
Article number232504
JournalApplied Physics Letters
Volume95
Issue number23
DOIs
Publication statusPublished - 2009 Dec 18
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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