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ID: 618072.0, MPI für Chemische Physik fester Stoffe / publications 2012
Field dependence of the Eu2+ spin relaxation in EuFe2-xCoxAs2
Authors:Garcia, F. A.; Leithe-Jasper, A.; Schnelle, W.; Nicklas, M.; Rosner, H.; Sichelschmidt, J.
Language:English
Date of Publication (YYYY-MM-DD):2012-06-07
Title of Journal:New Journal of Physics
Volume:14
Issue / Number:6
Start Page:063005-1
End Page:063005-12
Sequence Number of Article:063005
Review Status:not specified
Audience:Not Specified
Abstract / Description:The layered compound EuFe 2 As 2 is an interesting model system to investigate the effects of well-defined local Eu 2+ 4f states on the itinerant electronic and magnetic properties of the FeAs layers. To address this subject, we investigated the series EuFe 2− x Co x As 2(0.1 ⩽ x ⩽ 0.75) by electron spin resonance (ESR) of Eu 2+ to probe the spin dynamics of the itinerant subsystem. We relate the results to dc-susceptibility measurements and band structure calculations. As a consequence of the weak coupling between the local and itinerant subsystems, we found that the spin relaxation is well understood in terms of the exchange coupling among the local Eu 2+ spins. A pronounced field dependence of the Eu 2+ spin relaxation demonstrates the direct influence of magnetic fluctuations at the Fe 2− x Co x As 2 layers.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISSN:1367-2630 [ID No:1]
DOI:10.1088/1367-2630/14/6/063005
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