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Title: Skyrmions and Antiskyrmions in Quasi-Two-Dimensional Magnets

Abstract

A stable skyrmion, representing the smallest realizable magnetic texture, could be an ideal element for ultra-dense magnetic memories. Here, we review recent progress in the field of skyrmionics, which is concerned with studies of tiny whirls of magnetic configurations for novel memory and logic applications, with a particular emphasis on antiskyrmions. Magnetic antiskyrmions represent analogs of skyrmions with opposite topological charge. Just like skyrmions, antiskyrmions can be stabilized by the Dzyaloshinskii-Moriya interaction, as has been demonstrated in a recent experiment. Here, we emphasize differences between skyrmions and antiskyrmions, e.g., in the context of the topological Hall effect, skyrmion Hall effect, as well as nucleation and stability. Recent progress suggests that antiskyrmions can be potentially useful for many device applications. Antiskyrmions offer advantages over skyrmions as they can be driven without the Hall-like motion, offer increased stability due to dipolar interactions, and can be realized above room temperature.

Authors:
 [1];  [1]
  1. University of Nebraska-Lincoln, Lincoln, NE (United States)
Publication Date:
Research Org.:
University of Nebraska-Lincoln, Lincoln, NE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1474184
Alternate Identifier(s):
OSTI ID: 1510511
Grant/Contract Number:  
SC0014189
Resource Type:
Journal Article: Published Article
Journal Name:
Frontiers in Physics
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2296-424X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Dzyaloshinskii Moriya interaction; chiral spin textures; race-track memory; topological transport; magnetic skyrmion; antiskyrmion; skyrmion Hall effect; skyrmion stability

Citation Formats

Kovalev, Alexey A., and Sandhoefner, Shane. Skyrmions and Antiskyrmions in Quasi-Two-Dimensional Magnets. United States: N. p., 2018. Web. doi:10.3389/fphy.2018.00098.
Kovalev, Alexey A., & Sandhoefner, Shane. Skyrmions and Antiskyrmions in Quasi-Two-Dimensional Magnets. United States. doi:10.3389/fphy.2018.00098.
Kovalev, Alexey A., and Sandhoefner, Shane. Thu . "Skyrmions and Antiskyrmions in Quasi-Two-Dimensional Magnets". United States. doi:10.3389/fphy.2018.00098.
@article{osti_1474184,
title = {Skyrmions and Antiskyrmions in Quasi-Two-Dimensional Magnets},
author = {Kovalev, Alexey A. and Sandhoefner, Shane},
abstractNote = {A stable skyrmion, representing the smallest realizable magnetic texture, could be an ideal element for ultra-dense magnetic memories. Here, we review recent progress in the field of skyrmionics, which is concerned with studies of tiny whirls of magnetic configurations for novel memory and logic applications, with a particular emphasis on antiskyrmions. Magnetic antiskyrmions represent analogs of skyrmions with opposite topological charge. Just like skyrmions, antiskyrmions can be stabilized by the Dzyaloshinskii-Moriya interaction, as has been demonstrated in a recent experiment. Here, we emphasize differences between skyrmions and antiskyrmions, e.g., in the context of the topological Hall effect, skyrmion Hall effect, as well as nucleation and stability. Recent progress suggests that antiskyrmions can be potentially useful for many device applications. Antiskyrmions offer advantages over skyrmions as they can be driven without the Hall-like motion, offer increased stability due to dipolar interactions, and can be realized above room temperature.},
doi = {10.3389/fphy.2018.00098},
journal = {Frontiers in Physics},
issn = {2296-424X},
number = ,
volume = 6,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.3389/fphy.2018.00098

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Figures / Tables:

FIGURE 1 FIGURE 1: | (Top) Bloch (left) and Néel (middle) skyrmions with topological charge Q = 1 and polarity p = 1. Antiskyrmion (right) with topological charge Q = −1 and p = 1. (Bottom) For Néel skyrmion (left), Bloch skyrmion (middle), and antiskyrmion (right) the moments wrap around a unitmore » sphere upon application of stereographic projection.« less

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Works referenced in this record:

Spontaneous skyrmion ground states in magnetic metals
journal, August 2006

  • Rößler, U. K.; Bogdanov, A. N.; Pfleiderer, C.
  • Nature, Vol. 442, Issue 7104, p. 797-801
  • DOI: 10.1038/nature05056

    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.