Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/58836
Type: Artigo
Title: Raman scattering in the magnetically frustrated double perovskite Sr2YRuO6
Author: García-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 similar to 200K, much above the long-range antiferromagnetic ordering temperature, T-N1=32K, 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 similar to 25meV/200K below which unusual behavior associated with magnetic correlations is observed in this material. Copyright (c) 2013 John Wiley & Sons, Ltd.
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 similar to 200K, much above the long-range antiferromagnetic ordering temperature, T-N1=32K, 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 similar to 25meV/200K below which unusual behavior associated with magnetic correlations is observed in this material.
Subject: Correlações magnéticas
Acoplamento spin-fônon
Perovskitas duplas
Frustração magnética
Interações magnéticas
Raios X - Difração
Country: Reino Unido
Editor: John Wiley & Sons
Citation: Journal Of Raman Spectroscopy. Wiley-blackwell, v. 45, n. 2, n. 193, n. 196, 2014.
Rights: fechado
Identifier DOI: 10.1002/jrs.4431
Address: https://onlinelibrary.wiley.com/doi/full/10.1002/jrs.4431
Date Issue: 2014
Appears in Collections:IFGW - Artigos e Outros Documentos

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