Electric readout of magnetization dynamics in a ferromagnet-semiconductor system

Details Electric readout of magnetization dynamics in a ferromagnet-semiconductor system Electric readout of magnetization dynamics in a ferromagnet-semiconductor system

2006-01-28

arxiv.org/abs/cond-mat/0601642v2

Appl. Phys. Lett. 89, 042105 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revised version, 8 pages, 3 figures

Scientific paper

10.1063/1.2235881

We apply an analysis of time-dependent spin-polarized current in a semiconductor channel at room temperature to establish how the magnetization configuration and dynamics of three ferromagnetic terminals, two of them biased and third connected to a capacitor, affect the currents and voltages. In a steady state, the voltage on the capacitor is related to spin accumulation in the channel. When the magnetization of one of the terminals is rotated, a transient current is triggered. This effect can be used for electrical detection of magnetization reversal dynamics of an electrode or for dynamical readout of the alignment of two magnetic contacts.

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