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Authors: Grigorev, Vladimir
Filianina, Mariia
Lytvynenko, Yaryna
Sobolev, Sergei
Pokharel, Amrit Raj
Lanz, Amon P.
Sapozhnik, Alexey
Kleibert, Armin
Bodnar, Stanislav
Grigorev, Petr
Skourski, Yurii
Käeui, Mathias
Elmers, Hans-Joachim
Jourdan, Martin
Demsar, Jure
Title: Optically triggered Neel vector manipulation of a metallic antiferromagnet Mn2Au under strain
Online publication date: 15-Mar-2023
Year of first publication: 2022
Language: english
Abstract: The absence of stray fields, their insensitivity to external magnetic fields, and ultrafast dynamics make antiferromagnets promising candidates for active elements in spintronic devices. Here, we demonstrate manipulation of the Neel vector in the metallic collinear antiferromagnet Mn2Au by combining strain and femtosecond laser excitation. Applying tensile strain along either of the two in-plane easy axes and locally exciting the sample by a train of femtosecond pulses, we align the Neel vector along the direction controlled by the applied strain. The dependence on the laser fluence and strain suggests the alignment is a result of optically triggered depinning of 90 degrees domain walls and their motion in the direction of the free energy gradient, governed by the magneto-elastic coupling. The resulting, switchable state is stable at room temperature and insensitive to magnetic fields. Such an approach may provide ways to realize robust high-density memory device with switching time scales in the picosecond range.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Accepted version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: In Copyright
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Journal: ACS Nano
Pages or article number: 20589
Publisher: American Chemical Society
Publisher place: Washington, DC
Issue date: 2022
ISSN: 1936-0851
Publisher DOI: 10.1021/acsnano.2c07453
Appears in collections:JGU-Publikationen

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