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Current-induced spin-wave excitations in a single ferromagnetic layer

Y. Ji·C. L. Chien
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Abstract

A new current induced spin-torque transfer effect has been observed in a single ferromagnetic layer without resorting to multilayers. At a specific current density of one polarity injected from a point contact, abrupt resistance changes due to current-induced spin wave excitations have been observed. The critical current at the onset of spin-wave excitations depends linearly on the external field applied perpendicular to the layer. The observed effect is due to current-driven heterogeneity in an otherwise uniform ferromagnetic layer.

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Y. Ji, C. L. Chien. 2002-10-04. Current-induced spin-wave excitations in a single ferromagnetic layer. https://doi.org/10.1103/physrevlett.90.106601

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