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Type: Artigo de periódico
Title: Dramatic changes in the magnetic coupling mechanism for La-doped CaMnO3
Author: Granado, E
Moreno, NO
Martinho, H
Garcia, A
Sanjurjo, JA
Torriani, I
Rettori, C
Neumeier, JJ
Oseroff, SB
Abstract: The exchange interactions in polycrystalline samples of Ca1-xLaxMnO3 (0.00 less than or equal to x less than or equal to 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 similar to2%-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.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review Letters. American Physical Soc, v. 86, n. 23, n. 5385, n. 5388, 2001.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.86.5385
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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