Tuesday, September 18, 2012

1209.3643 (D. Fang et al.)

Electrical excitation and detection of magnetic dynamics with impedance
matching
   [PDF]

D. Fang, T. Skinner, H. Kurebayashi, R. P. Campion, B. L. Gallagher, A. J. Ferguson
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.
View original: http://arxiv.org/abs/1209.3643

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