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Readout of an antiferromagnetic spintronics system by strong exchange coupling of Mn2Au and Permalloy

Bommanaboyena, S. P. ; Backes, D. ; Veiga, L. S.I. ; Dhesi, S. S. ; Niu, Y. R. LU ; Sarpi, B. LU ; Denneulin, T. ; Kovács, A. LU ; Mashoff, T. and Gomonay, O. , et al. (2021) In Nature Communications 12(1).
Abstract

In antiferromagnetic spintronics, the read-out of the staggered magnetization or Néel 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 Néel 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 Néel... (More)

In antiferromagnetic spintronics, the read-out of the staggered magnetization or Néel 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 Néel 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 Néel 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.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
12
issue
1
article number
6539
publisher
Nature Publishing Group
external identifiers
  • scopus:85118949016
  • pmid:34764314
ISSN
2041-1723
DOI
10.1038/s41467-021-26892-7
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021, The Author(s).
id
b05e69fb-add9-4cb3-960f-d102e548ff0d
date added to LUP
2021-11-27 19:17:06
date last changed
2024-06-15 21:38:56
@article{b05e69fb-add9-4cb3-960f-d102e548ff0d,
  abstract     = {{<p>In antiferromagnetic spintronics, the read-out of the staggered magnetization or Néel 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 Mn<sub>2</sub>Au, a unique metallic antiferromagnet that exhibits Néel 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 Mn<sub>2</sub>Au Néel 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.</p>}},
  author       = {{Bommanaboyena, S. P. and Backes, D. and Veiga, L. S.I. and Dhesi, S. S. and Niu, Y. R. and Sarpi, B. and Denneulin, T. and Kovács, A. and Mashoff, T. and Gomonay, O. and Sinova, J. and Everschor-Sitte, K. and Schönke, D. and Reeve, R. M. and Kläui, M. and Elmers, H. J. and Jourdan, M.}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{Readout of an antiferromagnetic spintronics system by strong exchange coupling of Mn<sub>2</sub>Au and Permalloy}},
  url          = {{http://dx.doi.org/10.1038/s41467-021-26892-7}},
  doi          = {{10.1038/s41467-021-26892-7}},
  volume       = {{12}},
  year         = {{2021}},
}