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Title: Tailoring Magnetic Skyrmions by Geometric Confinement of Magnetic Structures

Abstract

Nanoscale magnetic skyrmions have interesting static and transport properties that make them candidates for future spintronic devices. Control and manipulation of the size and behavior of skyrmions is thus of crucial importance. Here, using a Ginzburg-Landau approach, we show theoretically that skyrmions and skyrmion lattices can be stabilized by a spatial modulation of the uniaxial magnetic anisotropy in a thin film of a centro-symmetric ferromagnet. Remarkably, the skyrmion size is determined by the ratio of the exchange length and the period of the spatial modulation of the anisotropy, at variance with conventional skyrmions stabilized by dipolar and Dzyaloshinskii–Moriya interactions.

Authors:
 [1];  [2];  [3];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Northwestern Argonne Inst. of Science and Engineering (NAISE)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1412696
Alternate Identifier(s):
OSTI ID: 1412997
Grant/Contract Number:  
AC02-06CH11357; DMR-1406568
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 24; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 36 MATERIALS SCIENCE; Hypothetical particles; Magnetic anisotropy; Thin films; Ferromagnetic materials; Superconductivity models

Citation Formats

Zhang, Steven S.-L., Phatak, C., Petford-Long, A K, and Heinonen, O. G. Tailoring Magnetic Skyrmions by Geometric Confinement of Magnetic Structures. United States: N. p., 2017. Web. doi:10.1063/1.5005904.
Zhang, Steven S.-L., Phatak, C., Petford-Long, A K, & Heinonen, O. G. Tailoring Magnetic Skyrmions by Geometric Confinement of Magnetic Structures. United States. doi:10.1063/1.5005904.
Zhang, Steven S.-L., Phatak, C., Petford-Long, A K, and Heinonen, O. G. Tue . "Tailoring Magnetic Skyrmions by Geometric Confinement of Magnetic Structures". United States. doi:10.1063/1.5005904. https://www.osti.gov/servlets/purl/1412696.
@article{osti_1412696,
title = {Tailoring Magnetic Skyrmions by Geometric Confinement of Magnetic Structures},
author = {Zhang, Steven S.-L. and Phatak, C. and Petford-Long, A K and Heinonen, O. G.},
abstractNote = {Nanoscale magnetic skyrmions have interesting static and transport properties that make them candidates for future spintronic devices. Control and manipulation of the size and behavior of skyrmions is thus of crucial importance. Here, using a Ginzburg-Landau approach, we show theoretically that skyrmions and skyrmion lattices can be stabilized by a spatial modulation of the uniaxial magnetic anisotropy in a thin film of a centro-symmetric ferromagnet. Remarkably, the skyrmion size is determined by the ratio of the exchange length and the period of the spatial modulation of the anisotropy, at variance with conventional skyrmions stabilized by dipolar and Dzyaloshinskii–Moriya interactions.},
doi = {10.1063/1.5005904},
journal = {Applied Physics Letters},
number = 24,
volume = 111,
place = {United States},
year = {2017},
month = {12}
}

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