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Phase-locking of multiple magnetic droplets by a microwave magnetic field

Journal article
Authors C. J. Wang
D. Xiao
Y. Zhou
Johan Åkerman
Y. W. Liu
Published in Aip Advances
Volume 7
Issue 5
ISSN 2158-3226
Publication year 2017
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1063/1.4975660
Keywords spin-torque oscillators, nano-oscillators, driven, solitons, devices, Science & Technology - Other Topics, Materials Science, Physics
Subject categories Physical Sciences

Abstract

Manipulating dissipative magnetic droplet is of great interest for both the fundamental and technological reasons due to its potential applications in the high frequency spin-torque nano-oscillators. In this paper, a magnetic droplet pair localized in two identical or non-identical nano-contacts in a magnetic thin film with perpendicular anisotropy can phase-lock into a single resonance state by using an oscillating microwave magnetic field. This resonance state is a little away from the intrinsic precession frequency of the magnetic droplets. We found that the phase-locking frequency range increases with the increase of the microwave field strength. Furthermore, multiple droplets with a random initial phase can also be synchronized by a microwave field. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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