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