60-65Microwave device jig
for evaluating magnetic thin films consists of two symmetrical radial copper
pad sections each having panel mounted RF connector. A non resonant
measurement method for obtaining spin Hall voltage across magnetic thin films
using ferromagnetic resonance was developed, based on electrical impedance of
thin film and copper pads of the microwave device jig both in contact with each
other. A geometry is introduced, which provides good impedance match
characteristics and is optimised for maximum power transmission. It also gives
the flexibility in measurements for any orientation of thin film with respect
to applied magnetic field. In this geometry, a quantitative study of the
microwave device jig has been done by measuring spin Hall voltages in the
frequency range 0.1-10 GHz for bilayer thin films. The experimentally recorded
voltages can be fully ascribed to SHE detection due to microwave induced FMR