EXAFS Measurements of Non-Superconducting PrBa2Cu306.9: Evidence Against Ba Site Pr Substitution
V G. Harris, D J. Fatemi, V. M. Browning, M. S. Osofsky, Terrell A. Vanderah
Extended X-ray absorption fine structure (EXAFS) measurements on non-superconducting PrBa2Cu3O6.9 are reported. Theoretical Pr L[Pi] EXAFS data, calculated for the case of Y-site and Ba-site occupation, were least-squares fit to the experimental Pr L^[Pi] EXAFS. Results indicate that the Pr ions overwhelmingly occupy the Y sites. Attempts to force Pr ions onto the Ba-site resulted in a deterioration of the goodness-of-fit parameter. These results present a serious challenge to models which rely on Ba-site Pr substitution as an explanation for the lack of superconductivity in PrBa2Cu3O7-[delta].
, Fatemi, D.
, Browning, V.
, Osofsky, M.
and Vanderah, T.
EXAFS Measurements of Non-Superconducting PrBa2Cu306.9: Evidence Against Ba Site Pr Substitution, Journal of Applied Physics
(Accessed May 29, 2023)