Thickness dependence study of current-driven ferromagnetic resonance in Y3Fe5O12/heavy metal bilayers
arXiv:1612.06111 · doi:10.1063/1.4977490
Abstract
We use ferromagnetic resonance to study the current-induced torques in YIG/heavy metal bilayers. YIG samples with thickness varying from 14.8 nm to 80 nm, with Pt or Ta thin film on top, are measured by applying a microwave current into the heavy metals and measuring the longitudinal DC voltage generated by both spin rectification and spin pumping. From a symmetry analysis of the FMR lineshape and its dependence on YIG thickness, we deduce that the Oersted field dominates over spin-transfer torque in driving magnetization dynamics.
8 pages, 3 figures
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Cited by in corpus (9)
- Low damping and microstructural perfection of sub-40nm-thin yttrium iron garnet films grown by liquid phase epitaxy
- Electrical properties of single crystal Yttrium Iron Garnet ultra-thin films at high temperatures
- Magnetic properties and domain structure of ultrathin yttrium iron garnet/Pt bilayers
- Relative weight of the inverse spin Hall and spin rectification effects for metallic Py,Fe/Pt and insulating YIG/Pt bilayers estimated by angular dependent spin pumping measurements
- Ultra-low damping in lift-off structured yttrium iron garnet thin films
- Ferromagnetic Resonance Studies of Strain tuned Bi:YIG Films
- Current-induced switching of YIG/Pt bilayers with in-plane magnetization due to Oersted fields
- Nonlinear longitudinal and transverse magnetoresistances due to current-induced magnon creation-annihilation processes
- Estimation of spin-orbit torques in the presence of current-induced magnon creation and annihilation