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Current-Driven Magnetization Dynamics in Magnetic Multilayers

S. Urazhdin
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Abstract

We develop a quantum analog of the classical spin-torque model for current-driven magnetic dynamics. The current-driven magnetic excitation at finite field becomes significantly incoherent. This excitation is described by an effective magnetic temperature rather than a coherent precession as in the spin-torque model. However, both the spin-torque and effective temperature approximations give qualitatively similar switching diagrams in the current-field coordinates, showing the need for detailed experiments to establish the proper physical model for current-driven dynamics.

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S. Urazhdin. 2003-11-30. Current-Driven Magnetization Dynamics in Magnetic Multilayers. https://doi.org/10.1103/physrevb.69.134430

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