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Measuring ISHE using the PPMS/DynaCool/VersaLab

6/25/2018

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Our distributor Quantum Design has issued an Application Note that describes how to use a our new dedicated ISHE CPW suitable for the CryoFMR probe available for the PPMS/DynaCool/VersaLab platforms.
If we consider a ferromagnet/non-magnetic bilayer (e.g. Ni80Fe20/Pd) undergoing FMR, a diffusive flow of spin from the Ni80Fe20 ferromagnet will enter the non-magnetic Pd layer due to a phenomenon known as spin pumping. Then, via the inverse spin Hall effect (ISHE), which can be significant in non-magnetic layers with a large spin-orbit interaction (e.g. Pt, W, Pd, etc.), this diffusive flow of spins will be converted into a measurable transverse DC voltage. Our new CPW integrates electrical contacts for measuring this ISHE generated voltage and are via the standard sample chamber wiring connected to a separate input on the CryoFMR spectrometer. The ISHE voltage is measured using the same lock-in amplifier used to measure the FMR response.
ishe--1087-203.pdf
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