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|Type:||Artigo de periódico|
|Title:||Effects Of Phase Separation On The Magnetization, X-ray Diffraction, And Raman Scattering Of (la1-yndy) 1-xcaxmno3 (y = 0,0.5,1.0;x = 1/3)|
|Abstract:||Dc-magnetization, x-ray diffraction, and Raman-scattering studies in polycrystalline (La1-yNdy)1-xCaxMnO3 (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 weakens 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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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