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Title: Tunnel magnetoresistance detection of skyrmions

Abstract

Micromagnetic simulations are used to investigate different strategies for tunnel magnetoresistance detection of the Néel skyrmion core direction and Bloch skyrmion chirality. When a Néel skyrmion passes beneath a perpendicularly magnetized dot separated by a tunnel barrier, a peak or dip in the tunnel magnetoresistance as a function of time reveals the core direction. When a Bloch skyrmion travels below a synthetic antiferromagnet, magnetized in-plane with an axis perpendicular to that of the track, the tunnel magnetoresistance as a function of time shows a peak followed by a dip, or vice versa, depending on the chirality. The results are compared with existing detection methods based on the Hall resistance.

Authors:
; ;
Publication Date:
Research Org.:
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1820676
Alternate Identifier(s):
OSTI ID: 1977332
Grant/Contract Number:  
SC0019237
Resource Type:
Published Article
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Name: Journal of Magnetism and Magnetic Materials Journal Volume: 541 Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
36 MATERIALS SCIENCE; Materials Science; Physics; Skyrmion; Magnetoresistance; Racetrack memory; Magnetic tunnel junction

Citation Formats

Chen, Hao, Bouckaert, William, and Majetich, Sara A. Tunnel magnetoresistance detection of skyrmions. Netherlands: N. p., 2022. Web. doi:10.1016/j.jmmm.2021.168552.
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Chen, Hao, Bouckaert, William, & Majetich, Sara A. Tunnel magnetoresistance detection of skyrmions. Netherlands. https://doi.org/10.1016/j.jmmm.2021.168552
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Chen, Hao, Bouckaert, William, and Majetich, Sara A. Sat . "Tunnel magnetoresistance detection of skyrmions". Netherlands. https://doi.org/10.1016/j.jmmm.2021.168552.
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@article{osti_1820676,
title = {Tunnel magnetoresistance detection of skyrmions},
author = {Chen, Hao and Bouckaert, William and Majetich, Sara A.},
abstractNote = {Micromagnetic simulations are used to investigate different strategies for tunnel magnetoresistance detection of the Néel skyrmion core direction and Bloch skyrmion chirality. When a Néel skyrmion passes beneath a perpendicularly magnetized dot separated by a tunnel barrier, a peak or dip in the tunnel magnetoresistance as a function of time reveals the core direction. When a Bloch skyrmion travels below a synthetic antiferromagnet, magnetized in-plane with an axis perpendicular to that of the track, the tunnel magnetoresistance as a function of time shows a peak followed by a dip, or vice versa, depending on the chirality. The results are compared with existing detection methods based on the Hall resistance.},
doi = {10.1016/j.jmmm.2021.168552},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 541,
place = {Netherlands},
year = {Sat Jan 01 00:00:00 EST 2022},
month = {Sat Jan 01 00:00:00 EST 2022}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.jmmm.2021.168552
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