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Science 14 January 2005:
Vol. 307. no. 5707, pp. 215 - 216
DOI: 10.1126/science.1107610
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Perspectives

APPLIED PHYSICS:
A Ringing Confirmation of Spintronics Theory

Mark Covington

"Spintronics" devices aim to exploit the angular momentum or "spin" of the electron. Before such a device can be realized, both theoretical and experimental challenges must be overcome. For example, it is known that a current of spin-polarized electrons can change the magnetic orientation of a nanometer-scale ferromagnet. But there are two competing theories about how this effect works. In his Perspective, Covington highlights the report by Krivorotov et al. (4), whose extensive set of dynamical measurements provides support for the "spin-torque" model.

The author is with Seagate Research, 1251 Waterfront Place, Pittsburgh, PA 15222, USA. E-mail: mark.covington{at}seagate.com

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Science. ISSN 0036-8075 (print), 1095-9203 (online)