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Type: Artigo de periódico
Title: Dramatic Changes In The Magnetic Coupling Mechanism For La-doped Camno3.
Author: Granado, E
Moreno, N O
Martinho, H
García, A
Sanjurjo, J A
Torriani, I
Rettori, C
Neumeier, J J
Oseroff, S B
Abstract: The exchange interactions in polycrystalline samples of Ca1-xLaxMnO3 (0.00< or =x< or =0.05) are studied by means of Raman scattering and electron paramagnetic resonance. Dramatic reductions in the spin-phonon interactions and magnetic correlations are observed for La doping levels as small as approximately 2%-3%. These results show that the charge carriers play an important role in the overall exchange coupling in the electron-doped manganites, even at very low doping levels.
Citation: Physical Review Letters. v. 86, n. 23, p. 5385-8, 2001-Jun.
Rights: aberto
Identifier DOI: 
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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