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  Atomic Scale Control of Spin Current Transmission at Interfaces

Wahada, M. A., Şaşıoğlu, E., Hoppe, W., Zhou, X., Deniz, H., Rouzegar, R., et al. (2022). Atomic Scale Control of Spin Current Transmission at Interfaces. Nano Letters, 22(9), 3539-3544. doi:10.1021/acs.nanolett.1c04358.

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 Creators:
Wahada, Mohamed Amine1, Author
Şaşıoğlu, Ersoy 2, Author
Hoppe, Wolfgang2, Author
Zhou, Xilin1, Author
Deniz, Hakan1, Author
Rouzegar, Reza3, Author           
Kampfrath, Tobias3, Author           
Mertig, Ingrid1, Author
Partkin, Stuart S. P.1, Author
Woltersdorf, Georg1, 2, Author
Affiliations:
1Max Planck Institute for Microstructure Physics, 06120 Halle, Germany, ou_persistent22              
2Institute of Physics, Martin Luther University Halle-Wittenberg, 06120 Halle, Germany, ou_persistent22              
3Department of Physics, Freie Universität Berlin, ou_persistent22              

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 Abstract: Ferromagnet/heavy metal bilayers represent a central building block for spintronic devices where the magnetization of the ferromagnet can be controlled by spin currents generated in the heavy metal. The efficiency of spin current generation is paramount. Equally important is the efficient transfer of this spin current across the ferromagnet/heavy metal interface. Here, we show theoretically and experimentally that for Ta as heavy metal the interface only partially transmits the spin current while this effect is absent when Pt is used as heavy metal. This is due to magnetic moment reduction at the interface caused by 3d–5d hybridization effects. We show that this effect can be avoided by atomically thin interlayers. On the basis of our theoretical model we conclude that this is a general effect and occurs for all 5d metals with less than half-filled 5d shell.

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Language(s): eng - English
 Dates: 2022-03-072021-11-112022-04-202022-05-11
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.nanolett.1c04358
 Degree: -

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Project name : ASPIN - Antiferromagntic spintronics
Grant ID : 766566
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: 6 Volume / Issue: 22 (9) Sequence Number: - Start / End Page: 3539 - 3544 Identifier: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403