Quantifying power flow processes mediated by spin currents
arXiv:2010.08997
Abstract
The power flow process mediated by spin current in the bilayer device consisting of ferromagnetic metal (FM) and non-magnetic metal (NM) layers is examined by realizing experimental evaluations for each process from the microwave absorption to electromotive force (EMF) output. The absorption power by ferromagnetic resonance (FMR) of the thin FM layer during the EMF output is directly measured in operando using an antenna probe system. The transfer efficiency of the absorption power into the NM layer by spin pumping is estimated from strict linewidth evaluation of EMF spectra. The maximum transfer efficiency of the spin pumping power to the external load via the inverse spin Hall effect is determined to be 4.2X10^(-8) under 160mW microwave irradiation using an analysis model assuming a parallel circuit. The main factors reducing the efficiency are found to be low resistivity of the NM layer and the interface loss. These quantifications are important as a first step to consider the efficient transfer of spin energy mediated by spin currents.
arXiv comment17pages, 5figures
References in corpus (14)
- Dissipationless Quantum Spin Current at Room Temperature
- Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
- Direct electronic measurement of the spin Hall effect
- Room Temperature Reversible Spin Hall Effect
- Scaling of spin Hall angle in 3d, 4d and 5d metals from Y3Fe5O12/metal spin pumping
- Detection and quantification of inverse spin Hall effect from spin pumping in permalloy/normal metal bilayers
- Indication of intrinsic spin Hall effect in 4d and 5d transition metals
- Acoustic spin pumping as the origin of the long-range spin Seebeck effect
- Extrinsic Spin Hall Effect Induced by Iridium Impurities in Copper
- Evolution of the spin Hall effect in Pt nanowires: Size and temperature effects
- Microwave photovoltage and photoresistance effects in ferromagnetic microstrips
- Spin Hall Angle Quantification from Spin Pumping and Microwave Photoresistance
- Self-induced inverse spin Hall effect in permalloy at room temperature
- Measurement of spin pumping voltage separated from extrinsic microwave effects