Oersted Field and Spin Current Effects on Magnetic Domains in [Co/Pd]
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Ross_Oersted field.pdf
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1.17 MB
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Author(s)
Chen, Jingsheng
Ho, Pin
Zhang, Jinshuo
Bono, David C
Ross, Caroline A
Date Issued
June 2016
Journal
IEEE Transactions on Magnetics
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Ho, Pin, Jinshuo Zhang, David C. Bono, Jingsheng Chen, and Caroline A. Ross. “Oersted Field and Spin Current Effects on Magnetic Domains in [Co/Pd]15Nanowires.” IEEE Transactions on Magnetics 52, no. 6 (June 2016): 1–6 © Institute of Electrical and Electronics Engineers (IEEE)
Version
Original manuscript
Abstract
An out-of-plane Oersted field produced from a current-carrying Au wire is used to induce local domain formation in wires made from [Co/Pd][subscript 15] multilayers with perpendicular anisotropy. A 100 ns pulsed current of 56-110 mA injected into the Au wire created a reverse domain size of 120-290 nm in a Co/Pd nanowire on one side of the Au wire. A Biot-Savart model was used to estimate the position dependence of the Oersted field around the Au wire. The shape, size, and location of the reversed region of Co/Pd were consistent with the magnitude of the Oersted field and the switching field distribution of the unpatterned film. A current density of 6.2 × 10[superscript 11] Am[superscript -2] in the Co/Pd nanowire did not translate the domain walls due to low spin transfer efficiency, but the Joule heating promoted domain growth in a field below the coercive field.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1109/TMAG.2016.2526972
