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Title: Skyrmion creation and annihilation by spin waves

Single skyrmion creation and annihilation by spin waves in a crossbar geometry are theoretically analyzed. A critical spin-wave frequency is required both for the creation and the annihilation of a skyrmion. The minimum frequencies for creation and annihilation are similar, but the optimum frequency for creation is below the critical frequency for skyrmion annihilation. If a skyrmion already exists in the cross bar region, a spin wave below the critical frequency causes the skyrmion to circulate within the central region. A heat assisted creation process reduces the spin-wave frequency and amplitude required for creating a skyrmion. The effective field resulting from the Dzyaloshinskii-Moriya interaction and the emergent field of the skyrmion acting on the spin wave drive the creation and annihilation processes.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Electrical and Computer Engineering, University of California, Riverside, California 92521 (United States)
  2. Department of Physics and Material Science Program, University of New Hampshire, Durham, New Hampshire 03824 (United States)
  3. Department of Physics and Astronomy, University of California, Riverside, California 92521 (United States)
Publication Date:
OSTI Identifier:
22482247
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 15; Other Information: (c) 2015 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; AMPLITUDES; ANNIHILATION; CRITICAL FREQUENCY; GEOMETRY; HEAT; SKYRME POTENTIAL; SOLITONS; SPIN WAVES