Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-6707
Authors: | Bommanaboyena, Satya Prakash Backes, Dirk Veiga, L. S. I. Dhesi, Sarnjeet S. Niu, Yuran R. Sarpi, Brice Denneulin, Thibaud Kovács, András Mashoff, Torge Gomonay, Olena Sinova, Jairo Everschor-Sitte, Karin Schönke, Daniel Reeve, Robert M. Kläui, Mathias Elmers, Hans-Joachim Jourdan, Martin |
Title: | Readout of an antiferromagnetic spintronics system by strong exchange coupling of Mn2Au and Permalloy |
Online publication date: | 19-Jan-2022 |
Year of first publication: | 2021 |
Language: | english |
Abstract: | In antiferromagnetic spintronics, the read-out of the staggered magnetization or Neel vector is the key obstacle to harnessing the ultra-fast dynamics and stability of antiferromagnets for novel devices. Here, we demonstrate strong exchange coupling of Mn2Au, a unique metallic antiferromagnet that exhibits Neel spin-orbit torques, with thin ferromagnetic Permalloy layers. This allows us to benefit from the well-established read-out methods of ferromagnets, while the essential advantages of antiferromagnetic spintronics are only slightly diminished. We show one-to-one imprinting of the antiferromagnetic on the ferromagnetic domain pattern. Conversely, alignment of the Permalloy magnetization reorients the Mn2Au Neel vector, an effect, which can be restricted to large magnetic fields by tuning the ferromagnetic layer thickness. To understand the origin of the strong coupling, we carry out high resolution electron microscopy imaging and we find that our growth yields an interface with a well-defined morphology that leads to the strong exchange coupling. Antiferromagnets offer faster operation speed and immunity to stray fields, however, readout of the Neel vector is difficult. Here, Bommanaboyena et al present a heterostructure of a ferromagnet and antiferromagnet, combining easy readout with the benefits of antiferromagnetic spintronics. |
DDC: | 530 Physik 530 Physics |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 08 Physik, Mathematik u. Informatik |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-6707 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
Document type specification: | Scientific article |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Nature Communications 12 |
Pages or article number: | 6539 |
Publisher: | Nature Publishing Group UK |
Publisher place: | London |
Issue date: | 2021 |
ISSN: | 2041-1723 |
Publisher URL: | https://doi.org/10.1038/s41467-021-26892-7 |
Publisher DOI: | 10.1038/s41467-021-26892-7 |
Appears in collections: | JGU-Publikationen |
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![]() | readout_of_an_antiferromagnet-20220114134416626.pdf | 1.62 MB | Adobe PDF | View/Open |