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|Type:||Artigo de periódico|
|Title:||Raman scattering in the magnetically frustrated double perovskite Sr2YRuO6|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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