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Current-induced magnetization reversal in terms of power dissipation

Abstract : Magnetization excitation and reversal induced by spin-transfer torques is described in terms of power received or dissipated in a macrospin system. This approach provides a clear and intuitive understanding of the effect of both applied magnetic fields and injected spin-polarized currents on magnetization reversal. It is illustrated by solving the case of magnetization reversal in a nanopillar spin valve with perpendicular magnetizations although the approach can be applied more generally. The appearance of critical currents below which spin-transfer torque is no longer efficient is explained by a break in the uniaxial symmetry of such structures.
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PhysRevB.84.100405 JCucchiara ...
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J. Cucchiara, Eric Fullerton, A. D. Kent, J. Z. Sun, Y. Henry, et al.. Current-induced magnetization reversal in terms of power dissipation. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2011, 84 (10), pp.100405. ⟨10.1103/PhysRevB.84.100405⟩. ⟨hal-01624060⟩

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