Qiu, Z, Hou, D, Barker, J orcid.org/0000-0003-4843-5516 et al. (3 more authors) (2018) Spin colossal magnetoresistance in an antiferromagnetic insulator. Nature Materials, 17 (7). pp. 577-580. ISSN 1476-1122
Abstract
Colossal magnetoresistance (CMR) refers to a large change in electrical conductivity induced by a magnetic field in the vicinity of a metal–insulator transition and has inspired extensive studies for decades1,2. Here we demonstrate an analogous spin effect near the Néel temperature, TN = 296 K, of the antiferromagnetic insulator Cr2O3. Using a yttrium iron garnet YIG/Cr2O3/Pt trilayer, we injected a spin current from the YIG into the Cr2O3 layer and collected, via the inverse spin Hall effect, the spin signal transmitted into the heavy metal Pt. We observed a two orders of magnitude difference in the transmitted spin current within 14 K of the Néel temperature. This transition between spin conducting and non-conducting states was also modulated by a magnetic field in isothermal conditions. This effect, which we term spin colossal magnetoresistance (SCMR), has the potential to simplify the design of fundamental spintronics components, for instance, by enabling the realization of spin-current switches or spin-current-based memories.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. This is an author produced version of a paper published in Nature Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Oct 2018 13:06 |
Last Modified: | 06 Feb 2020 11:58 |
Status: | Published |
Publisher: | Springer Nature |
Identification Number: | 10.1038/s41563-018-0087-4 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:136772 |