Theory of spin transfer phenomena in magnetic metals and semiconductors |
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Authors: | Alvaro S. Nú ñ ez,Allan H. MacDonald |
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Affiliation: | Department of Physics, The University of Texas at Austin, 1 University Station C1600, Austin, TX 78712-0264, USA |
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Abstract: | We propose a general theory of the spin-transfer effects that occur when current flows through inhomogeneous magnetic systems. Our theory does not rest on an appeal to conservation of total spin, can assess whether or not current-induced magnetization precession and switching in a particular geometry will occur coherently, and can estimate the efficacy of spin-transfer when spin-orbit interactions are present. We illustrate our theory by applying it to a toy-model twodimensional-electron-gas ferromagnet with Rashba spin-orbit interactions. |
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Keywords: | 72.25.&minus b 73.40.Jn 75.30.Ds |
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