Ferromagnetic resonance and spin pumping efficiency for inverse spin-Hall effect normalization in yttrium-iron-garnet-based systems

The inverse spin Hall effect has made its way from being a peculiar phenomenon predicted and discovered in semiconductors more than 30 years ago to being an extremely important effect in modern spintronics. It allows for the detection and conversion of spin current, along with the probing of the spin-orbit interaction of materials. However, the discrepancy between theoretical and experimental results has slowed down the progress of this branch of spintronics and its applications. In this study, we analyzed yttrium-iron-garnet-based systems highly exploited in spin pumping experiments and demonstrated the correct normalization procedure for the inverse spin Hall effect in such systems. (C) 2015 The Japan Society of Applied Physics