Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/65049
Type: Artigo de periódico
Title: Effects of phase separation on the magnetization, x-ray diffraction, and Raman scattering of (La1-yNdy)(1-x)CaxMnO3 (y=0,0.5,1.0; x=1/3)
Author: Granado, E
Garcia, A
Sanjurjo, JA
Rettori, C
Torriani, I
Abstract: Dc-magnetization, x-ray diffraction, and Raman-scattering studies in polycrystalline (La1-yNdy)(t-x)CaxMnO3 (y = 0.0,0.5,1.0, and x = 1/3) samples are presented. The samples with y = 0.5 and 1.0 show complex magnetic states at low temperatures, with a ferromagnetic coupling strength that weal;ens with increasing y. X-ray measurements show a single crystallographic phase at all temperatures for y = 0.5, with lattice parameter anomalies at temperatures related to electronic and magnetic transitions. The presence of high-frequency vibrational modes in Raman-scattering measurements indicates the existence of charge- and orbital-ordered domains for y=0.5 and 1.0, which are closely related to the antiferromagnetic component identified by the magnetization experiments. The close relationship between results obtained by magnetic, structural, and optical probes is discussed.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.63.064404
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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