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  Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments

Chikina, A., Höppner, M., Seiro, S., Kummer, K., Danzenbächer, S., Patil, S., et al. (2014). Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments. Nature Communications, 5: 3171, pp. 1-6. doi:10.1038/ncomms4171.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-2C69-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-2C78-5
Genre: Journal Article

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 Creators:
Chikina, A.1, Author
Höppner, M.1, Author
Seiro, S.2, Author              
Kummer, K.1, Author
Danzenbächer, S.1, Author
Patil, S.1, Author
Generalov, A.1, Author
Güttler, M.1, Author
Kucherenko, Yu.1, Author
Chulkov, E. V.1, Author
Koroteev, Yu. M.1, Author
Koepernik, K.1, Author
Geibel, C.3, Author              
Shi, M.1, Author
Radovic, M.1, Author
Laubschat, C.1, Author
Vyalikh, D. V.1, Author
Affiliations:
1external, ou_persistent22              
2Silvia Seiro, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863473              
3Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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 Abstract: Carrying a large, pure spin magnetic moment of 7 mu B per atom in the half-filled 4f shell, divalent europium is an outstanding element for assembling novel magnetic devices in which a two-dimensional electron gas may be polarized due to exchange interaction with an underlying magnetically-active Eu layer. Here we show that the Si-Rh-Si surface trilayer of the antiferromagnet EuRh2Si2 bears a surface state, which exhibits an unexpected and large spin splitting controllable by temperature. The splitting sets in below similar to 32.5 K, well above the ordering temperature of the Eu 4f moments (similar to 24.5 K) in the bulk, indicating a larger ordering temperature in the topmost Eu layers. The driving force for the itinerant ferromagnetism at the surface is the aforementioned exchange interaction. Such a splitting may also be induced into states of functional surface layers deposited onto the surface of EuRh2Si2 or similarly ordered magnetic materials with metallic or semiconducting properties.

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 Dates: 2014-01-21
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000331104000008
DOI: 10.1038/ncomms4171
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 5 Sequence Number: 3171 Start / End Page: 1 - 6 Identifier: ISSN: 2041-1723
CoNE: /journals/resource/2041-1723