arxiv: 1612.06111 · v1 · pith:X367PDBVnew · submitted 2016-12-19 · ❄️ cond-mat.mes-hall

Thickness dependence study of current-driven ferromagnetic resonance in Y3Fe5O12/heavy metal bilayers

Z. Fang , A. Mitra , A. L. Westerman , M. Ali , C. Ciccarelli , O. Cespedes , B. J. Hickey , A. J. Ferguson This is my paper

classification ❄️ cond-mat.mes-hall

keywords heavythicknessbilayersdependenceferromagneticmetalresonancespin

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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.

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Thickness dependence study of current-driven ferromagnetic resonance in Y3Fe5O12/heavy metal bilayers

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