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Oxygen K-edge EXAFS of the high-TC superconductor Y-Ba-Cu-O

โœ Scribed by Y.H. Kao; L.Y. Jang; W. Ng; A. Krol; S.C. Woronick; F. Xu; Y.D. Yao

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
140 KB
Volume
158
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

EXAFS spectra above the oxygen K absorption edge of the high-TC superconductor Y-Ba-Cu-0 have been studied by measuring the total electron yield (TEY) as a function of xray energy. Temperature variation of the TEY spectra was examined between 77K and 300K. These data provide evidence for the existence of local soft modes in the material.

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Microstructural and X-ray analyses were carried out on the Y-Ba-Cu-O superconductor compound doped with nickel. It is shown that there is a limited solubility of nickel in YBa2Cu307\_ 6 with a resultant Tยข (midpoint) slightly below liquid nitrogen temperature. Partial melting caused a sharp supercon