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Title: Self-oscillation in spin torque oscillator stabilized by field-like torque

Abstract

The effect of the field-like torque on the self-oscillation of the magnetization in spin torque oscillator with a perpendicularly magnetized free layer was studied theoretically. A stable self-oscillation at zero field is excited for negative β while the magnetization dynamics stops for β = 0 or β > 0, where β is the ratio between the spin torque and the field-like torque. The reason why only the negative β induces the self-oscillation was explained from the view point of the energy balance between the spin torque and the damping. The oscillation power and frequency for various β were also studied by numerical simulation.

Authors:
; ; ;  [1]
  1. National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba 305-8568 (Japan)
Publication Date:
OSTI Identifier:
22262605
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; MAGNETIZATION; OSCILLATORS; SPIN; TORQUE

Citation Formats

Taniguchi, Tomohiro, Tsunegi, Sumito, Kubota, Hitoshi, and Imamura, Hiroshi. Self-oscillation in spin torque oscillator stabilized by field-like torque. United States: N. p., 2014. Web. doi:10.1063/1.4871699.
Taniguchi, Tomohiro, Tsunegi, Sumito, Kubota, Hitoshi, & Imamura, Hiroshi. Self-oscillation in spin torque oscillator stabilized by field-like torque. United States. doi:10.1063/1.4871699.
Taniguchi, Tomohiro, Tsunegi, Sumito, Kubota, Hitoshi, and Imamura, Hiroshi. Mon . "Self-oscillation in spin torque oscillator stabilized by field-like torque". United States. doi:10.1063/1.4871699.
@article{osti_22262605,
title = {Self-oscillation in spin torque oscillator stabilized by field-like torque},
author = {Taniguchi, Tomohiro and Tsunegi, Sumito and Kubota, Hitoshi and Imamura, Hiroshi},
abstractNote = {The effect of the field-like torque on the self-oscillation of the magnetization in spin torque oscillator with a perpendicularly magnetized free layer was studied theoretically. A stable self-oscillation at zero field is excited for negative β while the magnetization dynamics stops for β = 0 or β > 0, where β is the ratio between the spin torque and the field-like torque. The reason why only the negative β induces the self-oscillation was explained from the view point of the energy balance between the spin torque and the damping. The oscillation power and frequency for various β were also studied by numerical simulation.},
doi = {10.1063/1.4871699},
journal = {Applied Physics Letters},
number = 15,
volume = 104,
place = {United States},
year = {Mon Apr 14 00:00:00 EDT 2014},
month = {Mon Apr 14 00:00:00 EDT 2014}
}