Superconducting properties of YBa2Cu3O7-Au composites

Autor:	C. Hinnen, M. Nicolas, C. Nguyen Van Huong, A. Dubon
Rok vydání:	1993
Předmět:	Superconductivity Materials science Valence (chemistry) Ionic radius Flux pinning X-ray photoelectron spectroscopy Mechanics of Materials Electrical resistivity and conductivity Mechanical Engineering Doping General Materials Science Composite material Magnetic susceptibility
Zdroj:	Journal of Materials Science. 28:6418-6426
ISSN:	1573-4803 0022-2461
Popis:	By X-ray diffraction and photoelectron spectroscopy, we have demonstrated that Au is incorporated in the YBCO lattice up to a concentration 0.1. An XPS study gave evidence for an electronic valence state Au1+. Its replacement in the Cu(1) site appears questionable due to the large difference in ionic radii (Cu2+∶0.073 nm; Au1+∶0.137 nm). The so called ‘irreversibility lines’ determined by AC susceptibility measurements are strongly affected by the doping. Up to the limit of solubility in the grains, an improvement in intra and intergrain coupling and flux pinning energy is observed, showing the beneficial interest of YBCO-Au composites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1d63d44b8377e4f8d3d225d2f37265e0 https://doi.org/10.1007/bf01352206 Zobrazit plný text záznamu Full text from SpringerLink