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  Strong reduction of the Korringa relaxation in the spin-density wave regime of EuFe2As2 observed by electron spin resonance

Dengler, E., Deisenhofer, J., von Nidda, H.-.-A.-K., Khim, S., Kim, J. S., Kim, K. H., et al. (2010). Strong reduction of the Korringa relaxation in the spin-density wave regime of EuFe2As2 observed by electron spin resonance. Physical Review B, 81(2): 024406, pp. 1-5. doi:10.1103/PhysRevB.81.024406.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-9D48-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-9D4C-C
Genre: Journal Article

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 Creators:
Dengler, E.1, Author
Deisenhofer, J.1, Author
von Nidda, H. -A. Krug1, Author
Khim, Seunghyun1, Author
Kim, J. S., Author
Kim, Kee Hoon1, Author
Casper, F.1, Author
Felser, C.2, Author              
Loidl, A.1, Author
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: Electron spin resonance measurements in EuFe2As2 single crystals revealed an absorption spectrum of a single resonance with Dysonian line shape. Above the spin-density wave (SDW) transition at T-SDW = 190 K the spectra are isotropic and the Eu spins relax via the conduction electrons resulting in a Korringa-type increase in the linewidth. Below T-SDW, a distinct anisotropy develops and the relaxation behavior of the Eu spins changes drastically into one with characteristic properties of a magnetic insulating system, where dipolar and crystal-field interactions dominate. This indicates a spatial confinement of the conduction electrons to the FeAs layers in the SDW state.

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 Dates: 2010-01-19
 Publication Status: Published in print
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Title: Physical Review B
  Other : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 81 (2) Sequence Number: 024406 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008