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Reference: Baker, AA, Figueroa, AI, Pingstone, D et al., (2016). Spin pumping in magnetic trilayer structures with an MgO barrier. Scientific Reports, 6, 35582.Citable link to this page:


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, isincreased 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 ofspin 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:PublishedPeer Review status:Peer reviewedVersion:Accepted ManuscriptDate of acceptance:2016-10-04Notes:© 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/

Bibliographic Details

Publisher: Nature Publishing Group

Publisher Website: http://www.nature.com/

Journal: Scientific Reportssee more from them

Publication Website: http://www.nature.com/srep/

Volume: 6

Extent: 35582

Issue Date: 2016-10

pages:35582 Identifiers

Doi: https://doi.org/10.1038/srep35582

Issn: 2045-2322

Uuid: uuid:2a49847f-930e-40b2-acaf-139ba6b48434

Urn: uri:2a49847f-930e-40b2-acaf-139ba6b48434

Pubs-id: pubs:648238 Item Description

Type: journal-article;

Version: Accepted ManuscriptKeywords: Article


Author: Baker, AA - Oxford, MPLS, Physics, Condensed Matter Physics fundingDiamond Light Source fundingEngineering and Physical Sciences

Source: https://ora.ox.ac.uk/objects/uuid:2a49847f-930e-40b2-acaf-139ba6b48434


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