Phys. Rev. B 65, 220401(R) (2002) [4 pages]

Spin torques in ferromagnetic/normal-metal structures

Abstract

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K. Xia¹, P. J. Kelly¹, G. E. W. Bauer², A. Brataas³, and I. Turek⁴
¹Faculty of Applied Physics and MESA⁺ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
²Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
³Harvard University, Lyman Laboratory of Physics, Cambridge, Massachusetts 02138
⁴Institute of Physics of Materials, Academy of Sciences of the Czech Republic, CZ-616 62 Brno, Czech Republic

Received 28 March 2002; published 23 May 2002

Recent theories of spin-current-induced magnetization reversal are formulated in terms of a spin-mixing conductance G^mix. We evaluate G^mix from first principles for a number of (dis)ordered interfaces between magnetic and nonmagnetic materials. We predict that the magnetization direction of a ferromagnetic insulator or of one side of a tunnel junction in a multiterminal device can be switched even though a negligible charge current is passed.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.65.220401

DOI:

10.1103/PhysRevB.65.220401

PACS:

72.25.-b, 71.15.Ap, 73.21.Ac

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Phys. Rev. B 65, 220401(R) (2002) [4 pages]

Spin torques in ferromagnetic/normal-metal structures