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

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

2002-10-04

arxiv.org/abs/cond-mat/0210116v1

Physics

Condensed Matter

12 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.90.106601

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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