Current-Driven Magnetization Dynamics in Magnetic Multilayers

Details Current-Driven Magnetization Dynamics in Magnetic Multilayers Current-Driven Magnetization Dynamics in Magnetic Multilayers

2003-08-15

arxiv.org/abs/cond-mat/0308320v2

Physics

Condensed Matter

Materials Science

5 pages, 2 figures

Scientific paper

10.1103/PhysRevB.69.134430

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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