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  Antiferromagnetic proximity effect in epitaxial CoO/NiO/MgO(001) systems

Li, Q., Liang, J. H., Luo, Y. M., Ding, Z., Gu, T., Hu, Z., et al. (2016). Antiferromagnetic proximity effect in epitaxial CoO/NiO/MgO(001) systems. Scientific Reports, 6: 22355, pp. 1-9. doi:10.1038/srep22355.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-2DDD-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-9CB3-5
Genre: Journal Article

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 Creators:
Li, Q.1, Author
Liang, J. H.1, Author
Luo, Y. M.1, Author
Ding, Z.1, Author
Gu, T.1, Author
Hu, Z.2, Author              
Hua, C. Y.3, Author              
Lin, H.-J.1, Author
Pi, T. W.1, Author
Kang, S. P.1, Author
Won, C.1, Author
Wu, Y. Z.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
3Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 Abstract: Magnetic proximity effect between two magnetic layers is an important focus of research for discovering new physical properties of magnetic systems. Antiferromagnets (AFMs) are fundamental systems with magnetic ordering and promising candidate materials in the emerging field of antiferromagnetic spintronics. However, the magnetic proximity effect between antiferromagnetic bilayers is rarely studied because detecting the spin orientation of AFMs is challenging. Using X-ray linear dichroism and magneto-optical Kerr effect measurements, we investigated antiferromagnetic proximity effects in epitaxial CoO/NiO/MgO(001) systems. We found the antiferromagnetic spin of the NiO underwent a spin reorientation transition from in-plane to out-of-plane with increasing NiO thickness, with the existence of vertical exchange spring spin alignment in thick NiO. More interestingly, the Neel temperature of the CoO layer was greatly enhanced by the adjacent NiO layer, with the extent of the enhancement closely dependent on the spin orientation of NiO layer. This phenomenon was attributed to different exchange coupling strengths at the AFM/AFM interface depending on the relative spin directions. Our results indicate a new route for modifying the spin configuration and ordering temperature of AFMs through the magnetic proximity effect near room temperature, which should further benefit the design of AFM spintronic devices.

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Language(s): eng - English
 Dates: 2016-03-02
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000371623800001
DOI: 10.1038/srep22355
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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 6 Sequence Number: 22355 Start / End Page: 1 - 9 Identifier: Other: 2045-2322
CoNE: https://pure.mpg.de/cone/journals/resource/2045-2322