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Title: Static property and current-driven precession of 2π-vortex in nano-disk with Dzyaloshinskii-Moriya interaction

An interesting type of skyrmion-like spin texture, 2π-vortex, is obtained in a thin nano-disk with Dzyaloshinskii-Moriya interaction. We have simulated the existence of 2π-vortex by micromagnetic method. Furthermore, the spin polarized current is introduced in order to drive the motion of 2π-vortex in a nano-disk with diameter 2 R = 140 nm. When the current density matches with the current injection area, 2π-vortex soon reaches a stable precession (3∼4 ns). The relationship between the precession frequency of 2π-vortex and the current density is almost linear. It may have potential use in spin torque nano-oscillators.
Authors:
; ; ;  [1] ;  [1] ;  [2]
  1. Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou, 730000 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22492313
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 8; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPUTERIZED SIMULATION; CURRENT DENSITY; MAGNETISM; NANOSTRUCTURES; OSCILLATORS; POTENTIALS; PRECESSION; SPIN; SPIN ORIENTATION; TEXTURE; TORQUE; VORTICES