Journal article
Spin pumping in magnetic trilayer structures with an MgO barrier
- Abstract:
- We present a study of the interaction mechanisms in magnetic trilayer structures with an MgO barrier grown by molecular beam epitaxy. The interlayer exchange coupling, Aex, is determined using SQUID magnetometry and ferromagnetic resonance (FMR), displaying an unexpected oscillatory behaviour as the thickness, tMgO, is increased from 1 to 4 nm. Transmission electron microscopy confirms the continuity and quality of the tunnelling barrier, eliminating the prospect of exchange arising from direct contact between the two ferromagnetic layers. The Gilbert damping is found to be almost independent of the MgO thickness, suggesting the suppression of spin pumping. The element-specific technique of x-ray detected FMR reveals a small dynamic exchange interaction, acting in concert with the static interaction to induce coupled precession across the multilayer stack. These results highlight the potential of spin pumping and spin transfer torque for device applications in magnetic tunnel junctions relying on commonly used MgO barriers.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.1MB, Terms of use)
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- Publisher copy:
- 10.1038/srep35582
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Funding agency for:
- Baker, A
- Publisher:
- Nature Publishing Group
- Journal:
- Scientific Reports More from this journal
- Volume:
- 6
- Pages:
- 35582
- Publication date:
- 2016-10-18
- Acceptance date:
- 2016-10-04
- DOI:
- ISSN:
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2045-2322
- Keywords:
- Pubs id:
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pubs:648238
- UUID:
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uuid:2a49847f-930e-40b2-acaf-139ba6b48434
- Local pid:
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pubs:648238
- Source identifiers:
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648238
- Deposit date:
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2016-10-06
Terms of use
- Copyright holder:
- Baker et al
- Copyright date:
- 2016
- Notes:
- © The Author(s) 2016. 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 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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