Temperature dependence of EXAFS spectrum in BiPbSrCaCu oxide superconductor

✍ Scribed by Akihisa Koizumi; Hiroshi Maruyama; Hitoshi Yamazaki; Hironobu Maeda; Tadao Ishii; Yoshinari Miura; Jun Takada

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 754 KB
• Volume: 190
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(92)90616-k

✦ Synopsis

Temperature dependence of extended X-ray absorption fine structure (EXAFS) is studied in the high-T¢ Bi-Pb-Sr-Ca-Cu oxide superconductor. Measurements were made at the Cu K-edge in the temperature range from 26.9 to 300 K. Interatomic distances and mean square relative displacement (MSRD: a ~2) of Cu-O bonds are determined by the least-squares refinement. An anomalous increase in the axial component of the MSRD is found near Tc while its equatorial component decreases normally with decreasing temperature. ' B.~,o ' 9.~o ' 9.~o ' g.8o iD:2o