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Charge and Zener polaron order in Bi0.75Sr0.25MnO3
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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.
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FRONTERA BECCARIA, Carlos, GARCÍA MUÑOZ, José luis, ARANDA, Miguel a. g., HERVIEU, Maryvonne, RITTER, Clemens, MAÑOSA, Lluís, GARCIA CAPDEVILA, Xavier, CALLEJA LÁZARO, Alberto. Charge and Zener polaron order in Bi0.75Sr0.25MnO3. _Physical Review B_. 2003. Vol. 68, núm. 13, pàgs. 134408-1-134408-9. [consulta: 22 de gener de 2026]. ISSN: 0163-1829. [Disponible a: https://hdl.handle.net/2445/10635]