Residual resistivity and oxygen stoichiometry in Pr2−xCexCuO4+δ single crystals
✍ Scribed by Matthias Brinkmann; Thomas Rex; Markus Stief; Heinrich Bach; Kurt Westerholt
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 591 KB
- Volume
- 269
- Category
- Article
- ISSN
- 0921-4534
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Using an improved high temperature reduction method we found that in the n-type high-Te-system Pr2-xCexCu04+6 bulk superconductivity can be established between x < 0.09 and x ~ 0.17 i.e. over a much broader range than previously reported. The T2-contribution to the resistivity increases with the Ce-
Ndl.85Ceo.15CuO 4 single crystals of improved quality have been grown by the TSFZ method at an oxygen partial pressure i~1 ambient atmosphere of 0.2, 0.1, 0.08 and 0.01 atm. Superconductivity in the as-grown state has been observed in the crystals grown at 0.08 and 0.01 atm. The improvement of the C