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28 March 2024 |
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Article overview
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Efficient magnonic transport and domain wall landscape of insulating antiferromagnetic thin films | Andrew Ross
; Romain Lebrun
; Olena Gomonay
; Daniel A. Grave
; Asaf Kay
; Lorenzo Baldrati
; Sven Becker
; Alireza Qaiumzadeh
; Camilo Ulloa
; Gerhard Jakob
; Florian Kronast
; Jairo Sinova
; Rembert Duine
; Arne Brataas
; Avner Rothschild
; Mathias Kläui
; | Date: |
5 Jul 2019 | Abstract: | Spintronics seeks to functionalize antiferromagnetic materials to develop
memory and logic devices operating at terahertz speed and robust against
external magnetic field perturbations. To be useful, such functionality needs
to be developed in thin film devices. The key functionality of long-distance
spin-transport has, however, so far only been reported in bulk single crystal
antiferromagnets, while in thin films, transport has so far been limited to a
few nanometers. In this work, we electrically achieve a long-distance
propagation of spin-information in thin films of the insulating antiferromagnet
hematite. Through transport and magnetic imaging, we demonstrate a strong
correlation between the efficiency of the transport of magnons, which carry
spin-information, and the magnetic domain structure of the films. In thin films
with large domains, magnons propagate over micrometer distances whilst they
attenuate over much shorter distances in multidomain thin films. The governing
factor of the attenuation is related to scattering at domain walls, and we
demonstrate that we can reduce this through training by field cyclings. For the
appropriate crystalline orientation of the films, spin-transport is achieved in
zero applied field across micrometers, as required for integration with
devices. | Source: | arXiv, 1907.2751 | Services: | Forum | Review | PDF | Favorites |
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