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Title: Magnetization reversal driven by a spin torque oscillator

Magnetization reversal of a magnetic free layer under spin transfer torque (STT) effect from a magnetic hard layer with a fixed magnetization direction and an oscillating layer is investigated. By including STT from the oscillating layer with in-plane anisotropy and orthogonal polarizer, magnetization-time dependence of free layer is determined. The results show that the frequency and amplitude of oscillations can be varied by adjusting the current density and magnetic properties. For an optimal oscillation frequency (f{sub opt}), a reduction of the switching time (t{sub 0}) of the free layer is observed. Both f{sub opt} and t{sub 0} increase with the anisotropy field of the free layer.
Authors:
 [1]
  1. Department of Physics, Sultan Qaboos University, P.O. Box 36, PC 123 Muscat (Oman)
Publication Date:
OSTI Identifier:
22311025
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMPLITUDES; ANISOTROPY; CURRENT DENSITY; LAYERS; MAGNETIC PROPERTIES; MAGNETIZATION; OSCILLATIONS; OSCILLATORS; REDUCTION; SPIN; TIME DEPENDENCE; TORQUE