Transmission electron microscopy observation of the decomposition of YBa{sub 2}Cu{sub 4}O{sub 8} into YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and CuO
- Institut fuer Metallphysik, Universitaet Goettingen, Hospitalstrasse 3/7, 37073 Goettingen (Germany)
The decomposition of YBa{sub 2}Cu{sub 4}O{sub 8}(Y-124) into YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}(Y-123) and CuO at high temperatures has been expected to create Y-123 with finely dispersed CuO precipitates suitable for flux pinning. In fact, samples of thermally decomposed Y-124 exhibit a critical current density, J{sub c}, which is enhanced with respect to the starting material as well as to pure Y-123. Transmission electron microscopy (TEM) studies of furnace annealed Y-124 were not suitable to clarify the reason for this J{sub c} enhancement. Nevertheless, the formation and growth of CuO precipitates have been observed by {ital in situ} decomposition of the Y-124 starting material due to electron beam heating within the TEM. {copyright} {ital 1997 Materials Research Society.}
- OSTI ID:
- 491773
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 4 Vol. 12; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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