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Effect of Cu2+ (S= ½) substitution on the antiferromagnetic ordered phases Co2(OH)XO4 (X = P y As)

Abstract: The isostructural Co1.5Cu0.5(OH)(XO4) (X = P, As) phases have been prepared from hydrothermal synthesis and characterized from powder X-ray diffraction. The structure consists of a three-dimensional framework in which M(1)O5-trigonal bipyramid dimers and M(2)O6-octahedral chains M = (Cu and Co) are simultaneously present. Magnetization measurements of Co1.5Cu0.5(OH)(PO4) show the presence of one maxima at ca. 60 K attributed to a three-dimensional antiferromagnetic ordering. This behaviour was confirmed from the ac measurements. Below TN, a significant irreversibility appears in ZFC-FC measurements suggesting the presence of some ferromagnetic contributions. When PO43? is substituted by AsO43? anions, the irreversibility exhibited for the Co-Cu hydroxi-phosphate disappears showing a broad maximum around 44 K accompanied by a large decrease below this temperature.

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Autoría: De Pedro I., Rojo J.M., Rodríguez Fernndez J., Rojo T.,

Congreso: International Conference on Magnetism: ICM 2009 (2009 : Karlsruhe, Alemania)

Editorial: Institute of Physics

Año de publicación: 2010

Nº de páginas: 4

Tipo de publicación: Comunicación a Congreso

DOI: 10.1088/1742-6596/200/8/082004

ISSN: 1742-6588,1742-6596

Proyecto español: MAT 2007-66737-c02-01

Url de la publicación: https://doi.org/10.1088/1742-6596/200/8/082004

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Autoría

MANUEL DE PEDRO DEL VALLE

ROJO, JOSÉ M.

JESUS MARIA RODRIGUEZ FERNANDEZ

ROJO, TEÓFILO

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