Tunable resistivity of individual magnetic domain walls

J.H. Franken, M. Hoeijmakers, H.J.M. Swagten, B. Koopmans

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)
106 Downloads (Pure)

Abstract

Despite the relevance of current-induced magnetic domain wall (DW) motion for new spintronics applications, the exact details of the current-domain wall interaction are not yet understood. A property intimately related to this interaction is the intrinsic DW resistivity. Here, we investigate experimentally how the resistivity inside a DW depends on the wall width ¿, which is tuned using focused ion beam irradiation of Pt/Co/Pt strips. We observe the nucleation of individual DWs with Kerr microscopy, and measure resistance changes in real time. A 1/¿2 dependence of DW resistivity is found, compatible with Levy-Zhang theory. Also quantitative agreement with theory is found by taking full account of the current flowing through each individual layer inside the multilayer stack.
Original languageEnglish
Article number037205
Pages (from-to)037205-1/4
Number of pages4
JournalPhysical Review Letters
Volume108
Issue number3
DOIs
Publication statusPublished - 2012

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