Superconducting properties of YBa2Cu3O7-Au composites
| ISSN: |
1573-4803
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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| Notes: |
Abstract 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.
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| Type of Medium: |
Electronic Resource
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| URL: |