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  Effect of interfacial insertion layers on the spin-orbit torque in W(O)|CoFeB heterostructures

Zhang, J., Phung, T., Hughes, B. P., Yang, S.-H., Garg, C., Jiang, Y., et al. (2019). Effect of interfacial insertion layers on the spin-orbit torque in W(O)|CoFeB heterostructures. Applied Physics Express, 12(3): 033001. doi:10.7567/1882-0786/aaf7f9.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-0CD6-9 Version Permalink: https://hdl.handle.net/21.11116/0000-000B-7F96-E
Genre: Journal Article

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Zhang_2019_Appl._Phys._Express_12_033001.pdf (Publisher version), 671KB
 
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https://doi.org/10.7567/1882-0786/aaf7f9 (Publisher version)
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 Creators:
Zhang, Jie1, Author
Phung, Timothy1, Author
Hughes, Brian P.1, Author
Yang, See-Hun1, Author
Garg, Chirag2, Author
Jiang, Yong1, Author
Parkin, Stuart S. P.2, Author                 
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1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              

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 Abstract: We report on an experimental investigation of spin-orbit torque (SOT) in W(O)∣CoFeB heterostructures where a thin insertion layer with negligible spin-orbit coupling is inserted at the W(O)∣CoFeB interface. The SOT is found to be suppressed with the addition of the insertion layer, contrary to estimates using the transparency formalism. In addition, the SOT, as quantified by the spin Hall angle remains constant at −50% for W(O) thicknesses down to 2 nm. Our data is thus consistent with an interfacial SOT mechanism in the W(O)∣CoFeB system.

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 Dates: 2019-02-122019-03
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13762
DOI: 10.7567/1882-0786/aaf7f9
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Title: Applied Physics Express
  Abbreviation : APEX
Source Genre: Journal
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Publ. Info: Institute of Physics Publishing (IOP) ; Japan Society of Applied Physics (JSAP)
Pages: - Volume / Issue: 12 (3) Sequence Number: 033001 Start / End Page: - Identifier: ISSN: 1882-0778
CoNE: https://pure.mpg.de/cone/journals/resource/1882-0778