MARIK, Sourav; MORÁN, Emilio; LABRUGÈRE, Christine; TOULEMONDE, Olivier; ALARIO-FRANCO, Miguel Ángel

doi:10.1007/s10948-012-1850-4

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MARIK, Sourav
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

MORÁN, Emilio
Departamento de Quimica Inorganica I

LABRUGÈRE, Christine
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Superconductivity and Novel Magnetism. 2013, vol. 26, n° 4, p. 1151-1154

Springer Verlag

Résumé en anglais

We report the effect of oxygen-annealing in the superconductivity and electronic states for the Mo0.3Cu0.7Sr2YCu2O y compound. The influence of oxygen annealing in the electronic states for Mo0.3Cu0.7Sr2YCu2O y associated with a nonsuperconducting to superconducting state transformation has been investigated by means of X-ray photoelectron spectroscopy, powder X-ray diffraction, magnetic susceptibility, and resistivity measurements. We unambiguously show the preeminence of the MoV state over the MoVI one; annealing under an oxygen atmosphere enhances both the MoVI and CuII amounts. The enhancement of MoVI after oxygen annealing is in close relation with the decrease in the O 2p→Cu 3d charge-transfer energy resulting in superconducting properties. Oxygen annealing is then seemed to reduce the copper plane hole concentration of the overdoped as-prepared sample, which induces superconductivity in the Cu-O planes.< Réduire

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Solid solution

Superconductivity

Copper compounds

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Influence of oxygen annealing in the superconductivity and electronic states of Mo0.3Cu0.7Sr2YCu2Oy

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