Current-driven switching in a single exchange-biased ferromagnetic layer.
We demonstrate spin-transfer torque effects in a single exchange-biased ferromagnetic layer. A current through a point contact to the exchange-biased Co layer reverses the magnetization of a nanodomain in the layer hysteretically for low applied magnetic fields and reversibly for high fields (up to 9 T). These effects are the inverse of the domain wall magnetoresistance, in the same way that similar effects in multilayers are the inverse of giant magnetoresistance.
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
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Chen
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Ji
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Chien
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Stiles