Please use this identifier to cite or link to this item: https://doi.org/10.1155/2015/457456
Title: Analysis of switchable spin torque oscillator for microwave assisted magnetic recording
Authors: Zhang, M
Zhou, T 
Yuan, Z
Issue Date: 2015
Citation: Zhang, M, Zhou, T, Yuan, Z (2015). Analysis of switchable spin torque oscillator for microwave assisted magnetic recording. Advances in Condensed Matter Physics 2015 : 457456. ScholarBank@NUS Repository. https://doi.org/10.1155/2015/457456
Rights: Attribution 4.0 International
Abstract: A switchable spin torque oscillator (STO) with a negative magnetic anisotropy oscillation layer for microwave assisted magnetic recording is analyzed theoretically and numerically. The equations for finding the STO frequency and oscillation angle are derived from Landau-Lifshitz-Gilbert (LLG) equation with the spin torque term in spherical coordinates. The theoretical analysis shows that the STO oscillating frequency remains the same and oscillation direction reverses after the switching of the magnetization of the spin polarization layer under applied alternative magnetic field. Numerical analysis based on the derived equations shows that the oscillation angle increases with the increase of the negative anisotropy energy density (absolute value) but decreases with the increase of spin current, the polarization of conduction electrons, the saturation magnetization, and the total applied magnetic field in the z direction. The STO frequency increases with the increase of spin current, the polarization of conduction electrons, and the negative anisotropy energy density (absolute value) but decreases with the increase of the saturation magnetization and the total applied magnetic field in the z direction. © 2015 Mingsheng Zhang et al.
Source Title: Advances in Condensed Matter Physics
URI: https://scholarbank.nus.edu.sg/handle/10635/180959
ISSN: 16878108
DOI: 10.1155/2015/457456
Rights: Attribution 4.0 International
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