Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-07-05
Phys. Rev. B 74, 134416 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 1 figure, final version. Changed title, updated references, added discussions in section II
Scientific paper
10.1103/PhysRevB.74.134416
We present a theoretical analysis of current driven ferromagnetic resonance in a ferromagnet/normal-metal/ferromagnet tri-layer. This method of driving ferromagnetic resonance was recently realized experimentally by Tulapurkar et al. [Nature 438, 339 (2005)] and Sankey et al. [Phys. Rev. Lett. 96, 227601 (2006)]. The precessing magnetization rectifies the alternating current applied to drive the ferromagnetic resonance and leads to the generation of a dc voltage. Our analysis shows that a second mechanism to generate a dc voltage, rectification of spin currents emitted by the precessing magnetization, has a contribution to the dc voltage that is of approximately equal size for the thin ferromagnetic films used in the experiment.
Adam Shaffique
Brouwer Piet. W.
Kupferschmidt Joern N.
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