Influence of oxygen annealing in the superconductivity and electronic states of Mo0.3Cu0.7Sr2YCu2Oy
Language
en
Article de revue
This item was published in
Journal of Superconductivity and Novel Magnetism. 2013, vol. 26, n° 4, p. 1151-1154
Springer Verlag
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Solid solution
Superconductivity
Copper compounds
Origin
Hal imported