High-resolution XANES study of Eu(Ba1-xRx)(2)Cu3O7+delta (R = Eu, Pr)
Journal
New Journal of Physics
Journal Volume
8
Date Issued
2006
Author(s)
Abstract
We have probed the distribution of hole carriers in Eu(Ba 1-xEux)2 Cu3O7+δ (x = 0-0.2) and Eu(Ba1-xPrx)2Cu 3O7+δ (x = 0-0.25) by O K-edge and Cu L-edge x-ray absorption spectra. Upon Eu and Pr substitution at the Ba site in Eu(Ba 1-xRx)2Cu3O7+δ, the concentration of holes in the CuO2 planes becomes greatly diminished. The depletion rate of hole carriers within the CuO2 planes in Eu(Ba1-xPrx)2Cu3O 7+δ is greater than that in Eu(Ba1-xEu x)2Cu3O7+δ. The rate of T c suppression with Pr doping in Eu(Ba1-xPr x)2Cu3O7+δ is accordingly greater than that in Eu(Ba1-xEux)2Cu 3O7+δ. © IOP Publishing Ltd. and Deutsche Physikalische Gesellschaft.
Type
journal article