ISSN:
1573-7357
Keywords:
74. 72. Bk
;
76. 80. +y
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In order to investigate the effect of Pr-substitution for Y element in Y123 high-Tc superconductors, Fe57-Mossbauer effect is measured for the samples of Y1-xPrxBa2(Cu1-yFey)3O7-z. The Mossbauer spectrum can be decomposed into 4 sets of doublet spectrum, D1,D2,D3 and D4, and isomer shift (δ) and quadruple splitting (Eq) for each component are obtained. We find that δ on CuO2plane increases with x inY1-xPrxBa2(Cu0.96Fe0.04)3O7-z as well as increase with oxygen reduction in YBa2(Cu0.96Fe0.04)3O7-z while δ in the samples containing Pr decreases by oxygen reduction above z=0.25. These variation of δ can be interpreted by the change of 4p electrons in virtual Fe4p orbital which is induced by hybridization with O2p of the nearest oxygen ions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00753907
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