Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/88114
Type: Artigo de periódico
Title: Raman Scattering In The Magnetically Frustrated Double Perovskite Sr 2yruo6
Author: Garcia-Flores A.F.
Terashita H.
Bittar E.M.
Jardim R.F.
Granado E.
Abstract: The spin correlations and excitations of the Sr2YRuO6 double perovskite are investigated by means of Raman scattering, complemented by synchrotron X-ray diffraction measurements. Anomalous softening of a breathing mode of the oxygen octahedra is observed below ∼200 K, much above the long-range antiferromagnetic ordering temperature, TN1 = 32 K, due to a spin-phonon coupling mechanism in the presence of magnetic correlations. A diffusive Raman signal is also observed, possibly associated with spin excitations within magnetically correlated regions. Our results point to a characteristic energy and temperature scale of ∼25 meV/200 K below which unusual behavior associated with magnetic correlations is observed in this material. Copyright © 2013 John Wiley & Sons, Ltd. Raman scattering study of the double perovskite Sr2YRuO6 was performed. Anomalous softening of a breathing mode of the oxygen octahedra is observed below ~200 K, much above the long-range antiferromagnetic ordering temperature, TN1 = 32 K, due to a spin-phonon coupling mechanism in the presence of magnetic correlations. A diffusive Raman signal of the low-wavenumber scattering at low temperatures is also observed, possibly associated with spin excitations within magnetically correlated regions. Copyright © 2013 John Wiley & Sons, Ltd.
Editor: 
Rights: fechado
Identifier DOI: 10.1002/jrs.4431
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84893828172&partnerID=40&md5=50703fd0683784473d119ffb0ed347b4
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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