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Title: Charge and Zener polaron order in Bi0.75Sr0.25MnO3
Author: Frontera Beccaria, Carlos
García Muñoz, José Luis
Aranda, Miguel A. G.
Hervieu, Maryvonne
Ritter, Clemens
Mañosa, Lluís
Garcia Capdevila, Xavier
Calleja Lázaro, Alberto
Keywords: Estructura electrònica
Química quàntica
Electrònica quàntica
Electronic structure of bulk materials
Quantum electronics
Issue Date: 2003
Publisher: The American Physical Society
Abstract: We have characterized the RT structure of Bi0.75Sr0.25MnO3 by means of electron diffraction, synchrotron x-ray, and neutron powder diffraction. These data evidence that a;b;A2ap and c;2ap average structure presents a modulation that doubles the a and c lattice parameters. The temperature evolution of this compound above RT has been investigated using magnetization, calorimetry measurements, and neutron powder diffraction. These data reveal that the superstructure disappears above ;575 K where a structural transition takes place. Susceptibility data show that, concomitant to the formation of the superstructure ~on cooling!, there is an enhancement of the effective paramagnetic moment as has also been found in other Bi-(Sr,Ca)MnO3 bismuth manganites. The observed features and cell evolution signals that a new type of charge and polaron ordering occurs at this composition.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2003, vol. 68, núm. 13, p. 134408-1-134408-9
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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