PerspectiveApplied Physics

A Ringing Confirmation of Spintronics Theory

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Science  14 Jan 2005:
Vol. 307, Issue 5707, pp. 215-216
DOI: 10.1126/science.1107610

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"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.