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  Mechanically tunable exchange coupling of Co/CoO bilayers on flexible muscovite substrates

Ha, T. D., Yen, M., Lai, Y.-H., Kuo, C.-Y., Chen, C.-T., Tanaka, A., et al. (2020). Mechanically tunable exchange coupling of Co/CoO bilayers on flexible muscovite substrates. Nanoscale, 12, 3284-3291. doi:10.1039/c9nr08810e.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-BB47-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-BD28-A
Genre: Journal Article

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 Creators:
Ha, Thai Duy1, Author              
Yen, Min2, Author
Lai, Yu-Hong2, Author
Kuo, Chang-Yang1, Author              
Chen, Chien-Te2, Author
Tanaka, Arata2, Author
Tsai, Li-Zai2, Author
Zhao, Yi-Feng2, Author
Duan, Chun-Gang2, Author
Lee, Shang-Fan2, Author
Chang, Chun-Fu3, Author              
Juang, Jenh-Yih2, Author
Chu, Ying-Hao2, Author
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              
3Chun-Fu Chang, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863447              

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 Abstract: The employment of flexible muscovite substrates has given us the feasibility of applying strain to heterostructures dynamically by mechanical bending. In this study, this novel approach is utilized to investigate strain effects on the exchange coupling in ferromagnetic Co and anti-ferromagnetic CoO (Co/CoO) bilayers. Two different Co/CoO bilayer heterostructures were grown on muscovite substrates by oxide molecular beam epitaxy, with the CoO layer being purely (111)- and (100)-oriented. The strain-dependent exchange coupling effect can only be observed on Co/CoO(100)/mica but not on Co/CoO(111)/mica. The origin of this phenomenon is attributed to the anisotropic spin re-orientation induced by mechanical bending. The strain-dependent magnetic anisotropy of the bilayers determined by anisotropic magnetoresistance measurements confirms this conjecture. This study elucidates the fundamental understanding of how magnetic exchange coupling can be tuned by externally applied strain via mechanical bending and, hence, provides a novel approach for implementing flexible spintronic devices. © 2020 The Royal Society of Chemistry.

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Language(s): eng - English
 Dates: 2020-01-132020-01-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1039/c9nr08810e
 Degree: -

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Title: Nanoscale
  Abbreviation : Nanoscale
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 12 Sequence Number: - Start / End Page: 3284 - 3291 Identifier: ISSN: 2040-3364
CoNE: https://pure.mpg.de/cone/journals/resource/2040-3364