Observation of spin-wave dark soliton pairs in yttrium iron garnet thin films

Zihui Wang, Mikhail Cherkasskii, Boris A. Kalinikos, and Mingzhong Wu
Phys. Rev. B 91, 174418 – Published 18 May 2015

Abstract

The formation of a pair of dark solitons from a single nonlinear black spin-wave pulse was observed. The experiments were carried out with a long and narrow magnetic yttrium iron garnet film strip in a surface spin-wave configuration. The black spin-wave pulses were excited by the use of microwave black pulses—large-amplitude microwaves with narrow squarelike dips. Pairs of black solitons were observed in certain input power and input black pulse width ranges. For each pair, the two solitons show opposite π phase jumps and an overall phase change of zero. Beyond those power and width ranges, one also observed pairs of gray solitons that showed opposite phase jumps and a zero total phase change. The formation of a single black soliton was also observed, but only for an input black pulse that was very narrow. The experimental observations were reproduced by numerical simulations based on the complex Ginzburg-Landau equation.

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  • Received 25 September 2014

DOI:https://doi.org/10.1103/PhysRevB.91.174418

©2015 American Physical Society

Authors & Affiliations

Zihui Wang1, Mikhail Cherkasskii2, Boris A. Kalinikos1,2, and Mingzhong Wu1,*

  • 1Department of Physics, Colorado State University, Fort Collins, Colorado 80523, USA
  • 2St. Petersburg Electrotechnical University, 197376 St. Petersburg, Russia

  • *Corresponding author: mwu@colostate.edu

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Vol. 91, Iss. 17 — 1 May 2015

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