Abstract
DC voltages via spin rectification effect (SRE), VDC, under microwave irradiation are investigated for three platinum (Pt)/ferromagnetic metal (FM) bilayer structures: Pt/Ni80Fe20, Pt/Co, and Pt/Fe. At the microwave frequency region lower than the resonant frequency, large VDC is obtained at zero DC magnetic field for all devices. In frequency dependence just around the resonant frequency, sharp rise and drop of magnitude in VDC are observed. These behaviors are well explained by the numerically calculated magnetic susceptibility. It is also found that the magnitude of VDC is strongly dependent on the slope of magnetoresistance spectrum. These findings lead to developments of sensitive detection technique for nano-scale magnetization switching.
Highlights
Small rectangular pattern of ferromagnetic metal (FM) electrode was drawn by using EB lithography with a negative resist
Because magnitude of signals in current induced magnetization switching is the same with that of hysteresis signals in the LFST-ferromagnetic resonance (FMR) measurements, hereafter we focus on the LFST-FMR signals
Since the sensitivity of the measurement of current induced magnetization switching using LFST-FMR depends on the magnitude of ΔV0FM, the observed enhancement leads to realization of highly sensitive detection techniques by choosing appropriate frequencies
Summary
Enhancement of low-frequency spin-orbit-torque ferromagnetic resonance signals by frequency tuning observed in Pt/Py, Pt/Co, and Pt/Fe bilayers.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
