Temperature-dependent EXAFS study on oriented YBa2Cu3O7−δ superconductor

✍ Scribed by H. Maeda; T. Ishii; H. Maruyama; Y. Kubozono; H. Yamazaki; M. Warden; S. Emura; E.A. Stern; S.M. Heald

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 152 KB
• Volume: 208-209
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)00873-t

✦ Synopsis

The polarized Cu K-edge EXAFS measurements on oriented powder of YBa2Cu307-a (To = 93 K, 5 ~tm grain size) are made as a function of temperature from 20 to 300 K for the a-b plane and the c axis being parallel to the X-ray polarization vector e. Here, we focus on the local structure of Cu-O bonds in the a-b planes. It is found that the average Cu-O (equatorial) distance and cumulants in the CuO, square plane show anomalous behaviors around To.