Sarma, D. D. ; Sen, P. ; Cimino, R. ; Carbope, C. ; Gudat, W. ; Sampathkumara, E. V. ; Das, I. (1991) Origin of nonmetallicity in PrBa2Cu3O7 from a study of Gd1−xPrxBa2Cu3O7 using soft X-ray absorption at the oxygen K-edge Solid State Communications, 77 (5). pp. 377-379. ISSN 0038-1098
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/003810...
Related URL: http://dx.doi.org/10.1016/0038-1098(91)90754-J
Abstract
We present the X-ray absorption data at the oxygen K-edge using total yield technique for Gd1−xPrxBa2Cu3O7 (x=0.0, 0.2, 0.4, 0.6, 0.8, and 1.0). The data clearly to oxygen that the holes doped in the GdBa2Cu3O7 due to oxygen composition are not removed by Pr doping even for the x=1.0 sample, suggesting that Pr is predominantly in the formally trivalent state. However, the data also clearly indicate the evidence of hybridization effects between the Pr3+ and the adjacent CuO2 layers. This is suggested to be responsible for the progressive suppression of Tc and the metallicity with Pr doping in these systems.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 47304 |
| Deposited On: | 08 Jul 2011 12:59 |
| Last Modified: | 23 Jun 2012 09:16 |
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