Spin-transfer torque induced spin waves in antiferromagnetic insulators

ORAL

Abstract

We explore the possibility of exciting spin waves in insulating antiferromagnetic films by injecting spin current at the surface. We analyze both magnetically compensated and uncompensated interfaces. We find that the spin current induced spin-transfer torque can excite spin waves in insulating antiferromagnetic materials and that the chirality of the excited spin wave is determined by the polarization of the injected spin current. Furthermore, the presence of magnetic surface anisotropy can greatly increase the accessibility of these excitations.

*Supported by NSF EFRI-1433496 (M.W.D), U.S. DOE Office of Basic Energy Sciences, Materials Sciences and Engineering (D.X. \& G.M.S.), Major State Basic Research Project of China and National Natural Science Foundation of China (W.G. and J.X.)

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Authors

  • Matthew Daniels

    • Carnegie Mellon University

  • Wei Guo

    • Fudan University

  • G. Malcolm Stocks

    • Oak Ridge National Laboratory

  • Di Xiao

    • Carnegie Mellon University
    • Carnegie Mellon Univ
    • Department of Physics, Carnegie Mellon University

  • Jiang Xiao

    • Fudan University