Switching field modulation of a nanomagnet by resonant microwave spin torque |
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Authors: | N Biziere E Murè J-Ph Ansermet |
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Institution: | Institut de Physique de la Matière Condensée, Ecole Polytechnique Fédérale de Lausanne, EPFL, Station 3, CH-1015 Lausanne, Switzerland |
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Abstract: | We report on the effect of a low amplitude microwave current on the switching field of magnetic layers in a 40 nm diameter pseudo-spin valve grown by template synthesis. We show a frequency dependence at room temperature reflecting the dynamic behavior of the switching process. This is confirmed by numerical calculation of the Landau-Lifschitz-Gilbert equation including Slonczewski Spin Transfer Torque term within a macrospin approximation. The possibility to modulate the switching fields of a nanomagnet with microwave currents offers an alternative to the magnetic switching assisted by microwave magnetic field. |
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Keywords: | Spin transfer torque Magnetic switching Spin dynamic |
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