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arXiv · 1209.3643

Electrical excitation and detection of magnetic dynamics with impedance matching

D. Fang·T. Skinner·H. Kurebayashi·R. P. Campion·B. L. Gallagher·A. J. Ferguson
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Abstract

Motivated by the prospects of increased measurement bandwidth, improved signal to noise ratio and access to the full complex magnetic susceptibility we develop a technique to extract microwave voltages from our high resistance (10 k{\Omega}) (Ga,Mn)As microbars. We drive magnetization precession with microwave frequency current, using a mechanism that relies on the spin orbit interaction. A capacitively coupled lambda/2 microstrip resonator is employed as an impedance matching network, enabling us to measure the microwave voltage generated during magnetisation precession.

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D. Fang, T. Skinner, H. Kurebayashi, R. P. Campion, B. L. Gallagher, A. J. Ferguson. 2012-09-17. Electrical excitation and detection of magnetic dynamics with impedance matching. https://doi.org/10.1063/1.4764519

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