Artículo
Correlation between thermoelectric properties and magnetic phases in the charge-ordered Pr0.5Sr0.5-xCaxMnO3
Fecha de publicación:
05/2000
Editorial:
Elsevier Science
Revista:
Journal of Magnetism and Magnetic Materials
ISSN:
0304-8853
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We have performed measurements of thermoelectric power (TEP), electrical resistivity, DC magnetization and X-ray powder diffraction in polycrystalline samples of the charge-ordered manganite Pr0.5Sr0.5-xCaxMnO3 for x = 0, 0.1 and 0.2. All the studied samples revealed three magnetic phases: paramagnetic at high temperatures, ferromagnetic below TC down to TN, below which the antiferromagnetic phase is established. At the paramagnetic-ferromagnetic transition, the TEP presents a clear break, and the three samples show metallic resistivity below TC. On the other hand, below TN all the samples turn to an insulating-like resistivity, but the TEP shows striking differences between the x = 0 sample and the other two. These differences are compatible with the different lattice and magnetic structures of the samples. These results support the idea that below TN a 2D-metal is present and no charge-order accompanies the A-type antiferromagnetic phase.
Palabras clave:
Phase Separation
,
Thermoelectric Properties
,
Manganites
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Identificadores
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Niebieskikwiat, Dario Gabriel; Sanchez, Rodolfo Daniel; Correlation between thermoelectric properties and magnetic phases in the charge-ordered Pr0.5Sr0.5-xCaxMnO3; Elsevier Science; Journal of Magnetism and Magnetic Materials; 221; 3; 5-2000; 285-292
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