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- W2000528314 abstract "The dynamics and magnetization structures of spin-torque oscillators (STOs) consisting of a planar free layer and a perpendicular polarizer and having diameters of 10–100 nm are investigated by micromagnetic and macrospin simulations. For models having a diameter of 50 nm, the current-dependent frequency exhibited three oscillation modes: uniform oscillation, continuous oscillation with edge-localized core of the z-component of the magnetization (Mz component), and non-continuous rotation. The uniform oscillation mode and edge-localized oscillation mode are distinguished from each other by observing the frequencies of the Mz components. Further, we found that the oscillation frequency of the edge-localized mode changed in a step-like fashion under an external magnetic field, which was not observed in the uniform oscillation mode. The frequency in the edge-localized mode became saturated as the current increased toward the non-continuous mode, with the trajectory of the core gradually moving toward the center of the free layer. Finally, a vortex was formed and the oscillation stopped. The above behavior was observed in STOs having a diameter of not less than 30 nm." @default.
- W2000528314 created "2016-06-24" @default.
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- W2000528314 date "2012-10-15" @default.
- W2000528314 modified "2023-09-24" @default.
- W2000528314 title "Magnetization states of a spin-torque oscillator having perpendicular polarizer and planar free layer" @default.
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- W2000528314 doi "https://doi.org/10.1063/1.4759313" @default.
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