Nanometer scale observation of high efficiency thermally assisted current-driven domain wall depinning

Nanometer scale observation of the depinning of a narrow domain wall (DW) under a spin current is reported. We studied approximately 12 nm wide 1D Bloch DWs created in thin films exhibiting perpendicular magnetic anisotropy. Magnetotransport measurements reveal thermally assisted current-driven DW m...

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Veröffentlicht in:Physical review letters 2005-09, Vol.95 (11), p.117203.1-117203.4, Article 117203
Hauptverfasser: RAVELOSONA, D, LACOUR, D, KATINE, J. A, TERRIS, B. D, CHAPPERT, C
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Sprache:eng
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Zusammenfassung:Nanometer scale observation of the depinning of a narrow domain wall (DW) under a spin current is reported. We studied approximately 12 nm wide 1D Bloch DWs created in thin films exhibiting perpendicular magnetic anisotropy. Magnetotransport measurements reveal thermally assisted current-driven DW motion between pinning sites separated by as little as 20 nm. The efficiency of current-driven DW motion assisted by thermal fluctuations is measured to be orders of magnitude higher than has been found for in-plane magnetized films, allowing us to control DW motion on a nanometer scale at low current densities.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.95.117203