Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Spin-electron-phonon Excitation In Re-based Half-metallic Double Perovskites.
Author: García-Flores, A F
Moreira, A F L
Kaneko, U F
Ardito, F M
Terashita, H
Orlando, M T D
Gopalakrishnan, J
Ramesha, K
Granado, E
Abstract: A remarkable hardening (~30 cm(-1)) of the normal mode of vibration associated with the symmetric stretching of the oxygen octahedra for the Ba(2)FeReO(6) and Sr(2)CrReO(6) double perovskites is observed below the corresponding magnetic ordering temperatures. The very large magnitude of this effect and its absence for the antisymmetric stretching mode provide evidence against a conventional spin-phonon coupling mechanism. Our observations are consistent with a collective excitation formed by the combination of the vibrational mode with oscillations of Fe or Cr 3d and Re 5d occupations and spin magnitudes.
Rights: aberto
Identifier DOI: 
Date Issue: 2012
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

Files in This Item:
File SizeFormat 
pmed_22680901.pdf661.65 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.