Thermal spin-transfer in Fe-MgO-Fe tunnel junctions

  • Jia X
  • Xia K
  • Bauer G
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We compute thermal spin transfer torques (TST) in Fe-MgO-Fe tunnel junctions using a first principles wave function-matching method. At room temperature, the TST in a junction with 3 MgO monolayers amounts to 10^-7J/m^2/K, which is estimated to cause magnetization reversal for temperature differences over the barrier of the order of 10 K. The large TST can be explained by multiple scattering between interface states through ultrathin barriers. The angular dependence of the TST can be very skewed, possibly leading to thermally induced high-frequency generation.

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  • Xingtao Jia

  • Ke Xia

  • Gerrit E. W. Bauer

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