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Title: Skyrmion relaxation dynamics in the presence of quenched disorder

Abstract

Using Langevin molecular dynamics simulations we study relaxation processes of interacting skyrmion systems with and without quenched disorder. Here, using the typical diffusion length as the time-dependent length characterizing the relaxation process, we find that clean systems always display dynamical scaling, and this even in cases where the typical length is not a simple power law of time. In the presence of the Magnus force, two different regimes are identified as a function of the noise strength. The Magnus force has also a major impact when attractive pinning sites are present, as this velocity-dependent force helps skyrmions to bend around defects and avoid caging effects. With the exception of the limit of large noise, for which dynamical scaling persists even in the presence of quenched disorder, attractive pinning sites capture a substantial fraction of skyrmions which results in a complex behavior of the two-time autocorrelation function that is not reproduced by a simple aging scaling ansatz.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]
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  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Publication Date:
Research Org.:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1542268
Alternate Identifier(s):
OSTI ID: 1546467; OSTI ID: 1855203
Grant/Contract Number:  
SC0002308; FG02-09ER46613
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Magnetism, topological defects, skyrmions, non-equilibrium relaxation, aging, dynamic scaling

Citation Formats

Brown, Barton L., Tauber, Uwe Claus, and Pleimling, Michel. Skyrmion relaxation dynamics in the presence of quenched disorder. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.024410.
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Brown, Barton L., Tauber, Uwe Claus, & Pleimling, Michel. Skyrmion relaxation dynamics in the presence of quenched disorder. United States. https://doi.org/10.1103/PhysRevB.100.024410
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Brown, Barton L., Tauber, Uwe Claus, and Pleimling, Michel. Tue . "Skyrmion relaxation dynamics in the presence of quenched disorder". United States. https://doi.org/10.1103/PhysRevB.100.024410. https://www.osti.gov/servlets/purl/1542268.
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@article{osti_1542268,
title = {Skyrmion relaxation dynamics in the presence of quenched disorder},
author = {Brown, Barton L. and Tauber, Uwe Claus and Pleimling, Michel},
abstractNote = {Using Langevin molecular dynamics simulations we study relaxation processes of interacting skyrmion systems with and without quenched disorder. Here, using the typical diffusion length as the time-dependent length characterizing the relaxation process, we find that clean systems always display dynamical scaling, and this even in cases where the typical length is not a simple power law of time. In the presence of the Magnus force, two different regimes are identified as a function of the noise strength. The Magnus force has also a major impact when attractive pinning sites are present, as this velocity-dependent force helps skyrmions to bend around defects and avoid caging effects. With the exception of the limit of large noise, for which dynamical scaling persists even in the presence of quenched disorder, attractive pinning sites capture a substantial fraction of skyrmions which results in a complex behavior of the two-time autocorrelation function that is not reproduced by a simple aging scaling ansatz.},
doi = {10.1103/PhysRevB.100.024410},
journal = {Physical Review B},
number = 2,
volume = 100,
place = {United States},
year = {Tue Jul 09 00:00:00 EDT 2019},
month = {Tue Jul 09 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevB.100.024410
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Citation Metrics:
Cited by: 16 works
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Figures / Tables:

FIG. 1 FIG. 1: Selected regions from two systems: with the Magnus force (top) and without (bottom). The skyrmions (black circles) start from a disordered state and relax in the presence of the attractive pinning centers (red circles). (Left) The paths of the particles (blue lines) from t = 10 to tmore » = 10, 000 are shown. In the case of the Magnus force, the trajectories bend and loop, avoiding pinning centers. (Middle) The location of each skyrmion and pinning site at t = 10, 000. (Right) Voronoi tessellations of the selected regions at t = 10, 000. Regions in green have six edges, whereas regions in blue and red have seven and five edges, respectively. The skyrmion lattice has fewer defects in the presence of the Magnus force, which is due to the fact that the Magnus force accelerates the relaxation of the system. In both simulations, the noise strength is set to σ = 0.1 which accounts for the fluctuations in the paths.« less
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Works referenced in this record:

Magnetic skyrmions on a two-lane racetrack
journal, February 2017

Spin Transfer Torques in MnSi at Ultralow Current Densities
journal, December 2010

Particle model for skyrmions in metallic chiral magnets: Dynamics, pinning, and creep
journal, June 2013

Dynamical Defects in Rotating Magnetic Skyrmion Lattices
journal, May 2017

A mechanism to pin skyrmions in chiral magnets
journal, January 2013

Current-driven skyrmion dynamics in disordered films
journal, March 2017

  • Kim, Joo-Von; Yoo, Myoung-Woo
  • Applied Physics Letters, Vol. 110, Issue 13
  • DOI: 10.1063/1.4979316

Skyrmions on the track
journal, March 2013

  • Fert, Albert; Cros, Vincent; Sampaio, João
  • Nature Nanotechnology, Vol. 8, Issue 3
  • DOI: 10.1038/nnano.2013.29

Current-induced skyrmion dynamics in constricted geometries
journal, September 2013

  • Iwasaki, Junichi; Mochizuki, Masahito; Nagaosa, Naoto
  • Nature Nanotechnology, Vol. 8, Issue 10
  • DOI: 10.1038/nnano.2013.176

Skyrmion Lattice in a Chiral Magnet
journal, February 2009

Nucleation, stability and current-induced motion of isolated magnetic skyrmions in nanostructures
journal, October 2013

Nonequilibrium phases and segregation for skyrmions on periodic pinning arrays
journal, October 2018

Vortices in high-temperature superconductors
journal, October 1994

Collective Transport Properties of Driven Skyrmions with Random Disorder
journal, May 2015

Avalanches and Criticality in Driven Magnetic Skyrmions
journal, March 2018

Universal current-velocity relation of skyrmion motion in chiral magnets
journal, February 2013

  • Iwasaki, Junichi; Mochizuki, Masahito; Nagaosa, Naoto
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms2442

Capturing of a magnetic skyrmion with a hole
journal, February 2015

Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets
journal, February 2016

  • Woo, Seonghoon; Litzius, Kai; Krüger, Benjamin
  • Nature Materials, Vol. 15, Issue 5
  • DOI: 10.1038/nmat4593

Skyrmion flow near room temperature in an ultralow current density
journal, January 2012

  • Yu, X. Z.; Kanazawa, N.; Zhang, W. Z.
  • Nature Communications, Vol. 3, Issue 1
  • DOI: 10.1038/ncomms1990

Effect of the Magnus force on skyrmion relaxation dynamics
journal, January 2018

Skyrmion Hall effect revealed by direct time-resolved X-ray microscopy
journal, December 2016

  • Litzius, Kai; Lemesh, Ivan; Krüger, Benjamin
  • Nature Physics, Vol. 13, Issue 2
  • DOI: 10.1038/nphys4000

Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers
journal, July 2017

  • Soumyanarayanan, Anjan; Raju, M.; Gonzalez Oyarce, A. L.
  • Nature Materials, Vol. 16, Issue 9
  • DOI: 10.1038/nmat4934

Noise fluctuations and drive dependence of the skyrmion Hall effect in disordered systems
journal, September 2016

Steady-State Motion of Magnetic Domains
journal, February 1973

Pinning and movement of individual nanoscale magnetic skyrmions via defects
journal, May 2016

Topological properties and dynamics of magnetic skyrmions
journal, December 2013

Room-Temperature Current-Induced Generation and Motion of sub-100 nm Skyrmions
journal, March 2017

Theory of the magnetic skyrmion glass
journal, January 2018

Reversible to irreversible transitions in periodically driven skyrmion systems
journal, January 2019

  • Brown, B. L.; Reichhardt, C.; Reichhardt, C. J. O.
  • New Journal of Physics, Vol. 21, Issue 1
  • DOI: 10.1088/1367-2630/aaf8dd

Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
journal, March 2015

  • Zhang, Xichao; Ezawa, Motohiko; Zhou, Yan
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep09400

Brownian motion of magnetic domain walls and skyrmions, and their diffusion constants
journal, June 2018

Guided current-induced skyrmion motion in 1D potential well
journal, May 2015

  • Purnama, I.; Gan, W. L.; Wong, D. W.
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep10620

Pinning of magnetic skyrmions in a monolayer Co film on Pt(111): Theoretical characterization and exemplified utilization
journal, December 2017

  • Stosic, Dusan; Ludermir, Teresa B.; Milošević, Milorad V.
  • Physical Review B, Vol. 96, Issue 21
  • DOI: 10.1103/PhysRevB.96.214403

Theory of current-driven skyrmions in disordered magnets
journal, April 2018

Emergent electrodynamics of skyrmions in a chiral magnet
journal, February 2012

  • Schulz, T.; Ritz, R.; Bauer, A.
  • Nature Physics, Vol. 8, Issue 4
  • DOI: 10.1038/nphys2231

Real-space observation of a two-dimensional skyrmion crystal
journal, June 2010

Direct observation of the skyrmion Hall effect
journal, September 2016

  • Jiang, Wanjun; Zhang, Xichao; Yu, Guoqiang
  • Nature Physics, Vol. 13, Issue 2
  • DOI: 10.1038/nphys3883

Chiral skyrmions in thin magnetic films: new objects for magnetic storage technologies?
journal, September 2011

Dynamical Defects in Rotating Magnetic Skyrmion Lattices
text, January 2017

Skyrmion Lattice in a Chiral Magnet
text, January 2009

Spin Transfer Torques in MnSi at Ultra-low Current Densities
text, January 2010

Chiral skyrmions in thin magnetic films: new objects for magnetic storage technologies?
text, January 2011

Current-induced skyrmion dynamics in constricted geometries
text, January 2013

Collective Transport Properties of Driven Skyrmions with Random Disorder
text, January 2014

Pinning and movement of individual nanoscale magnetic skyrmions via defects
text, January 2016

Tunable Room Temperature Magnetic Skyrmions in Ir/Fe/Co/Pt Multilayers
text, January 2016

Room-temperature current-induced generation and motion of sub-100nm skyrmions
text, January 2017

Dynamical defects in rotating magnetic skyrmion lattices
text, January 2017

The effect of the Magnus force on skyrmion relaxation dynamics
text, January 2018

Brownian motion of magnetic domain walls and skyrmions, and their diffusion constants
text, January 2018

Reversible to Irreversible Transitions in Periodically Driven Skyrmion Systems
text, January 2018

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    Works referencing / citing this record:

    Chiral Edge Currents for ac Driven Skyrmions in Confined Pinning Geometries
    text, January 2019

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      Figures / Tables found in this record:

      FIG. 1 (p. 6)figure
      FIG. 2 (p. 10)figure
      TABLE I (p. 11)table
      FIG. 3 (p. 12)figure
      FIG. 4 (p. 13)figure
      TABLE II (p. 14)table
      FIG. 5 (p. 15)figure
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