Current-driven domain wall motion in heterostructured ferromagnetic nanowires
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Beach_Current-driven.pdf
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Author(s)
Jang, Youngman
Mascaro, Mark D.
Beach, Geoffrey Stephen
Ross, Caroline A.
Date Issued
March 2012
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Citation
Jang, Youngman, Mark D. Mascaro, G. S. D. Beach, and C. A. Ross. Current-driven Domain Wall Motion in Heterostructured Ferromagnetic Nanowires. Applied Physics Letters 100, no. 11 (2012): 112401. © 2012 American Institute of Physics.
Version
Final published version
Abstract
Micromagnetic modeling shows that the placement of non-magnetic conductive pads on a ferromagnetic wire affects the current-induced velocity of a domain wall (DW) in the wire and can act as a DW chirality filter. The pads shunt the current, causing a non-uniform spin current distribution inside the ferromagnetic wire and an Oersted field transverse to the wire. This suppresses Walker breakdown allowing higher current densities to be imposed before breakdown occurs. The transverse Oersted field pins the DW under some regimes of current density and pad geometry, selectively allowing transmission of DWs of only one chirality.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.3692797
