Journal article
Spin pumping in ferromagnet-topological insulator-ferromagnetheterostructures
- Abstract:
- Topological insulators (TIs) are enticing prospects for the future of spintronics due to their large spin-orbit coupling and dissipationless, counter-propagating conduction channels in the surface state. However, a means to interact with and exploit the topological surface state remains elusive. Here, we report a study of spin pumping at the TI-ferromagnet interface, investigating spin transfer dynamics in a spin-valve like structure using element specific time-resolved x-ray magnetic circular dichroism and ferromagnetic resonance. Gilbert damping increases approximately linearly with increasing TI thickness, indicating efficient behaviour as a spin sink. However, layer-resolved measurements suggest that a dynamic coupling is limited. These results shed new light on the spin dynamics of this novel material class and suggest great potential for TIs in spintronic devices, through their novel magnetodynamics that persist even up to room temperature.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Supplementary materials, 231.1KB, Terms of use)
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(Preview, Version of record, pdf, 863.9KB, Terms of use)
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- Publisher copy:
- 10.1038/srep07907
Authors
- Publisher:
- Nature Publishing Group
- Journal:
- Scientific Reports More from this journal
- Volume:
- 5
- Issue:
- 1
- Article number:
- 7907
- Publication date:
- 2015-01-20
- Acceptance date:
- 2014-12-19
- DOI:
- EISSN:
-
2045-2322
- ISSN:
-
2045-2322
- Language:
-
English
- Pubs id:
-
pubs:500335
- UUID:
-
uuid:d8a73632-1a63-4e87-8c3c-972324dfd077
- Local pid:
-
pubs:500335
- Source identifiers:
-
500335
- Deposit date:
-
2015-03-14
Terms of use
- Copyright holder:
- Baker et al.
- Copyright date:
- 2015
- Rights statement:
- This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
- Licence:
- CC Attribution (CC BY)
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