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Direct dynamic imaging of non-adiabatic spin torque effects

Author

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  • S.D. Pollard

    (Brookhaven National Laboratory
    Stony Brook University)

  • L. Huang

    (Brookhaven National Laboratory
    Stony Brook University)

  • K.S. Buchanan

    (Colorado State University)

  • D.A. Arena

    (National Synchrotron Source, Brookhaven National Laboratory)

  • Y. Zhu

    (Brookhaven National Laboratory
    Stony Brook University)

Abstract

Spin-transfer torques offer great promise for the development of spin-based devices. The effects of spin-transfer torques are typically analysed in terms of adiabatic and non-adiabatic contributions. Currently, a comprehensive interpretation of the non-adiabatic term remains elusive, with suggestions that it may arise from universal effects related to dissipation processes in spin dynamics, while other studies indicate a strong influence from the symmetry of magnetization gradients. Here we show that enhanced magnetic imaging under dynamic excitation can be used to differentiate between non-adiabatic spin-torque and extraneous influences. We combine Lorentz microscopy with gigahertz excitations to map the orbit of a magnetic vortex core with

Suggested Citation

  • S.D. Pollard & L. Huang & K.S. Buchanan & D.A. Arena & Y. Zhu, 2012. "Direct dynamic imaging of non-adiabatic spin torque effects," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2025
    DOI: 10.1038/ncomms2025
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