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Stochastic formation of magnetic vortex structures in asymmetric disks triggered by chaotic dynamics

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms6620· OSTI ID:1167390
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Daegu Gyeongbuk Inst. of Science and Technology, Daegu (Korea)
  2. Ulsan National Inst. of Science and Technology, Ulsan (Korea)
  3. Univ. of Hamburg (Germany)
  4. Daegu Gyeongbuk Inst. of Science and Technology, Daegu (Korea)
  5. Univ. of Hamburg (Germany); Max Planck Inst. for Structure and Dynamics of Matter, Hamburg (Germany)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
+ Show Author Affiliations
The non-trivial spin configuration in a magnetic vortex is a prototype for fundamental studies of nanoscale spin behaviour with potential applications in magnetic information technologies. Arrays of magnetic vortices interfacing with perpendicular thin films have recently been proposed as enabler for skyrmionic structures at room temperature, which has opened exciting perspectives on practical applications of skyrmions. An important milestone for achieving not only such skyrmion materials but also general applications of magnetic vortices is a reliable control of vortex structures. However, controlling magnetic processes is hampered by stochastic behaviour, which is associated with thermal fluctuations in general. Here we show that the dynamics in the initial stages of vortex formation on an ultrafast timescale plays a dominating role for the stochastic behaviour observed at steady state. Our results show that the intrinsic stochastic nature of vortex creation can be controlled by adjusting the interdisk distance in asymmetric disk arrays.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1167390
Report Number(s):
LBNL--6890E
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 5; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (12)

Tunable geometrical frustration in magnonic vortex crystals journal January 2018
Field Response of Magnetic Vortices in Dusty Olivine From the Semarkona Chondrite journal March 2019
Simultaneous control of magnetic topologies for reconfigurable vortex arrays journal February 2017
Realization of ground-state artificial skyrmion lattices at room temperature journal October 2015
Spin-wave interference in magnetic vortex stacks journal September 2018
Magnetic vortex nucleation modes in static magnetic fields journal October 2017
X-rays and magnetism journal August 2015
Techniques in micromagnetic simulation and analysis journal July 2017
Characteristics and controllability of vortices in ferromagnetics, ferroelectrics, and multiferroics journal June 2017
Realization of Ground-State Artificial Skyrmion Lattices at Room Temperature conference August 2016
Vortex Annihilation Dependence of Chirality in Asymmetric Permalloy Dots journal March 2019
Field Response of Magnetic Vortices in Dusty Olivine From the Semarkona Chondrite text January 2019

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