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EXAFS Measurements of Non-Superconducting PrBa2Cu306.9: Evidence Against Ba Site Pr Substitution

Published

Author(s)

V G. Harris, D J. Fatemi, V. M. Browning, M. S. Osofsky, Terrell A. Vanderah

Abstract

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].
Citation
Journal of Applied Physics
Volume
83
Issue
11

Keywords

Ba-site, EXAFS, PrBa2Cu307, superconductivity

Citation

Harris, V. , Fatemi, D. , Browning, V. , Osofsky, M. and Vanderah, T. (1998), EXAFS Measurements of Non-Superconducting PrBa2Cu306.9: Evidence Against Ba Site Pr Substitution, Journal of Applied Physics (Accessed February 27, 2024)
Created February 12, 1998, Updated October 12, 2021