Spin transport in thin-film materials can be studied by ferromagnetic resonantly (FMR) driven spin pumping of a charge-free spin current which induces an electromotive force through the inverse spin Hall effect (ISHE). For quantitative ISHE experiments, precise control of the FMR driving field amplitude B1 is crucial. This study exploits in situ monitoring of B1 by utilization of electron paramagnetic resonantly (EPR) induced transient nutation of paramagnetic molecules (a 1:1 complex of {\alpha},{\gamma}-bisdiphenylene-{\beta}-phenylallyl and benzene, BDPA) placed as B1 probe in proximity of a NiFe/Pt-based ISHE device. Concurrent to an ISHE experiment, B1 is obtained from the inductively measured BDPA Rabi-nutation frequency. Higher reproducibility is achieved by renormalization of the ISHE voltage to B12 with an accuracy that is determined by the homogeneity of the FMR driving field and thus by the applied microwave resonator and ISHE device setup.
@article{arxiv.1610.02759,
title = {Driving field amplitude gauged quantitative inverse spin Hall effect detection},
author = {Marzieh Kavand and Chuang Zhang and Dali Sun and Hans Malissa and Zeev Valy Vardeny and Christoph Boehme},
journal= {arXiv preprint arXiv:1610.02759},
year = {2017}
}