Layer-selective detection of magnetization directions from two layers of antiferromagnetically-coupled magnetizations by ferromagnetic resonance using a spin-torque oscillator
Journal of Magnetism and Magnetic Materials(2020)
Abstract
•Magnetization states of 2 recording layers (RLs) are detected layer-selectively.•A spin-torque oscillator (STO) is used as a read device.•The STO induces and detects state-dependent ferromagnetic resonance (FMR) in each RL.•The RLs are designed to suppress interlayer interference caused by dipolar fields.•The changes in STO oscillation occur on a 1-ns timescale shown by moving the STO.
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Key words
Three-dimensional magnetic recording,Spin-torque oscillator,Ferromagnetic resonance,Micromagnetic simulation
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