Modeling of magnetization precession in spin-torque nano-oscillators with a tilted polarizer

Gang Lv,Linhui Wang,Yaowen Liu,Guihua Li,Zhiwei Hou,Xuecheng Cao,Yufeng Qin,Hong Zhang

doi:10.1063/1.4927585

Gang Lv, Linhui Wang + Show 6 more

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https://doi.org/10.1063/1.4927585

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Journal: AIP Advances	Publication Date: Jul 1, 2015
Citations: 8	License type: CC BY 3.0

Affiliation: Shandong Agricultural University, Tongji University

Abstract

The spin-torque induced magnetization precession dynamics are studied in a spin-valve with a tilted spin polarizer. Macrospin simulations demonstrate that the frequency of precession state depends both on the external DC current and the intrinsic parameters of devices such as the tilted angle of spin polarizer, the damping factor and saturation magnetization of the free layer. The dependence role of those parameters is characterized by phase diagrams. An analytical model is presented, which can successfully interpret the features of precession frequency.

Highlights

The spin-torque induced magnetization precession dynamics are studied in a spinvalve with a tilted spin polarizer
Macrospin simulations demonstrate that the frequency of precession state depends both on the external DC current and the intrinsic parameters of devices such as the tilted angle of spin polarizer, the damping factor and saturation magnetization of the free layer
In the TP-spin-torque nano-oscillator (STNO) device, the magnetization of the fixed layer is tilted with respect to the film plane, which can be achieved by using materials with strong titled perpendicular magneto crystalline anisotropy.[35]

Summary

Introduction

The spin-torque induced magnetization precession dynamics are studied in a spinvalve with a tilted spin polarizer. Modeling of magnetization precession in spin-torque nano-oscillators with a tilted polarizer Macrospin simulations demonstrate that the frequency of precession state depends both on the external DC current and the intrinsic parameters of devices such as the tilted angle of spin polarizer, the damping factor and saturation magnetization of the free layer.

Results

Conclusion