Abstract
The Pr L3-edge and Cu K-edge x-ray absorption near-edge spectra (XANES) data for the insulating PrBa2Cu3O7-y (y = 0.05, 0.11, 0.21, 0.26, 0.57, 0.62, 0.79) and Pr1+xBa2-xCu3O7-y (x = 0.2, 0.4, 0.6, 0.8, 1.0) samples are reported. The anomalous antiferromagnetic Néel temperature TN decreases monotonically from 18.5 K for oxygenated compound (y = 0.05) to 11 K for oxygen-reduced compound (y = 0.79). The Pr L3-edge (2p-5d transition) XANES data indicate that the formal Pr valence decreases from 3.17 for y = 0.05 to 3.01 for y = 0.79 . The Cu K-edge (1s-4p transition) XANES data show that the threshold energy (edge inflection point) shifts from 8982.2 eV for y = 0.05 to 8980.2 eV for y = 0.79.A systematic variation was found that peak A and peak B of Cu K-edge XANES intensities increas with oxygen content (hole doping).