Strong reduction of the Korringa relaxation in the spin-density wave regime of EuFe2As2 observed by electron spin resonance
SCIE
SCOPUS
- Title
- Strong reduction of the Korringa relaxation in the spin-density wave regime of EuFe2As2 observed by electron spin resonance
- Authors
- Dengler, E; Deisenhofer, J; von Nidda, HAK; Khim, S; Kim, JS; Kim, KH; Casper, F; Felser, C; Loidl, A
- Date Issued
- 2010-01
- Publisher
- AMER PHYSICAL SOC
- 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12223
- DOI
- 10.1103/PHYSREVB.81.024406
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 81, no. 2, 2010-01
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