Tc Enhancement by local oxygen breathing modes in Ba(Pb, Bi)O3
β Scribed by G. Vielsack; W. Weber
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 217 KB
- Volume
- 235-240
- Category
- Article
- ISSN
- 0921-4534
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Neutron and X-ray powder diffractograms of the title compound were refined by the Rietveld method. Within the bismuth layer an additional oxygen site with population parameter 0.12 was found which is interpreted as the excess oxygen. From the comparison of population parameters from neutron and X-ra
S upemonducting tapes with high-purity substituted TI(1223) powders (> 95 wt.%, Tc ~ 120 K) were produced by a new method based on an in-situ reaction under high pressure of helium (25 bar He/0.5 bar 02). A Ag(20 wt.% Au) alloy showed to be a good sheath material for an in-tape reaction up to 990Β°C,