Fe{sup 57}-Moessbauer study in Y{sub 1-x}Pr{sub x}Ba{sub 2}(Cu{sub 1-y}Fe{sub y}){sub 3}O{sub 7-z}
Journal Article
·
· Journal of Low Temperature Physics
- Science Univ. of Tokyo, Chiba (Japan)
In order to investigate the effect of Pr-substitution for Y element in Y123 high-Tc superconductors, Fe{sup 57}-Mossbauer effect is measured for the samples of Y{sub 1{minus}x}Pr{sub x}Ba{sub 2}(Cu{sub 1{minus}y}Fe{sub y}){sub 3}O{sub 7{minus}z}. The Mossbauer spectrum can be decomposed into 4 sets of doublet spectrum, D1, D2, D3 and D4, and isomer shift ({delta}) and quadruple splitting (Eq) for each component are obtained. The authors find that {delta} on CuO{sub 2} plane increases with x in Y{sub 1{minus}x}Pr{sub x}Ba{sub 2}(Cu{sub 0.96}Fe{sub 0.04}){sub 3}O{sub 7{minus}z} as well as increase with oxygen reduction in YBa{sub 2}(Cu{sub 0.96}Fe{sub 0.04}){sub 3}O{sub 7{minus}z} while {delta} in the samples containing Pr decreases by oxygen reduction above z=0.25. These variation of {delta} can be interpreted by the change of 4p electrons in virtual Fe 4p orbital which is induced by hybridization with O 2p of the nearest oxygen ions.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443687
- Report Number(s):
- CONF-960808--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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