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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 LandauLifschitzGilbert 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. (C) 2010 Elsevier B.V. All rights reserved.
Mihai Adrian Ionescu, Elison de Nazareth Matioli, Pirouz Sohi, Riyaz Mohammed Abdul Khadar