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OXYGEN-PRESSURE, THE KEY FACTOR FOR OPTIMIZATION OF SUPERCONDUCTIVITY IN THE 1212-PHASE PB1-XSR2CA0.5Y0.5CU2+XO7+/-DELTA

Abstract:

The influence of oxygen pressure upon superconducting properties of lead-based 1212 copper oxides Pb1-xSr2Ca0.5Y0.5Cu2+xO7±δ has been investigated as a function of time and annealing temperature. Annealings of (Pb0.7Cu0.3)Sr2Ca0.5Y0.5Cu2O7±δ at 400°C for 10 h show that this material becomes superconductive as the oxygen pressure reaches 10 bar, the critical temperature being increased from 0 to 29 K. The maximum value of Tc = 42 K is obtained for an oxygen pressure ranging between 40 and 60 b...

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Publication status:
Published

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Journal:
PHYSICA C
Volume:
177
Issue:
4-6
Pages:
461-468
Publication date:
1991-07-01
DOI:
ISSN:
0921-4534
URN:
uuid:42ea1b79-3436-4608-995e-8759ebfef966
Source identifiers:
46596
Local pid:
pubs:46596
Language:
English

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