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Spin Torque-Generated Magnetic Droplet Solitons

Journal article
Authors S. M. Mohseni
S. R. Sani
J. Persson
T. N. A. Nguyen
Sunjae Chung
Yevgen Pogoryelov
Pranaba Muduli Kishor
Ezio Iacocca
A. Eklund
Randy K. Dumas
S. Bonetti
A. Deac
M. A. Hoefer
Johan Åkerman
Published in Science
Volume 339
Issue 6125
Pages 1295-1298
ISSN 0036-8075
Publication year 2013
Published at Department of Physics (GU)
Pages 1295-1298
Language en
Links dx.doi.org/10.1126/science.1230155
Keywords waves, excitation, states, WSerpico, ClaudioSerpico, C201081PHYSICAL REVIEW BnullIVANOV, BAIVANOV, BAKOSEVICH
Subject categories Other Natural Sciences

Abstract

Dissipative solitons have been reported in a wide range of nonlinear systems, but the observation of their magnetic analog has been experimentally challenging. Using spin transfer torque underneath a nanocontact on a magnetic thin film with perpendicular magnetic anisotropy (PMA), we have observed the generation of dissipative magnetic droplet solitons and report on their rich dynamical properties. Micromagnetic simulations identify a wide range of automodulation frequencies, including droplet oscillatory motion, droplet "spinning," and droplet "breather" states. The droplet can be controlled by using both current and magnetic fields and is expected to have applications in spintronics, magnonics, and PMA-based domain-wall devices.

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