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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2004     Display Documents

ID: 192802.0, MPI für Festkörperforschung / FKF Publikationen 2004
Coexistence of dimerization and long-range magnetic order in the frustrated spin-chain system LiCu2O2: Inelastic light scattering study
Authors:Choi, K.-Y.; Zvyagin, S. A.; Cao, G.; Lemmens, P.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Physical Review B
Issue / Number:10
Sequence Number of Article:104421
Review Status:not specified
Audience:Not Specified
Abstract / Description:Raman scattering studies of the frustrated spin chain system LiCu2O2
are reported. Two transitions into a magnetically ordered phase (taken
place at temperatures similar to9 and similar to24 K) have been
confirmed from the analysis of optical properties of the samples.
Interestingly, two different magnetic excitations, seen at 100 and 110
cm(-1) in the magnetically ordered phase superimpose each other
independently, indicating a coherent coexistence of long-range magnetic
order and dimerization. The observed phenomenon is attributed to
magnetostructural peculiarities of LiCu2O2 leading to the intrinsic
presence of magnetic/nonmagnetic impurities on a nanometer scale. In
particular, magnetic impurities play a significant role in driving the
transition from an incommensurate state to a Neel ordered one at 9 K.
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany.
; Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
; Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
; MPI Solid State Res, D-70569 Stuttgart, Germany.
Identifiers:ISI:000220813500059 [ID No:1]
ISSN:1098-0121 [ID No:2]
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