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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Neal, M.J. Pathare, V.M. |
| Copyright Year | 1965 |
| Abstract | The effects of time, temperature, and coating thickness on the oxygenation of silver-coated YBa/sub 2/Cu/sub 3/O/sub 7- delta / wire during a postprocessing anneal were examined. Two different grades of silver-coated wire as well as bare ceramic fiber were subjected to a variety of isothermal and continuous-cooling oxygen anneals. DC transport J/sub c/, AC magnetic susceptibility, optical microscopy, and scanning electron microscopy were used to characterize the samples. It is expected that a continuous-cooling anneal will be more efficient than an isothermal anneal for oxygenating YBa/sub 2/Cu/sub 3/O/sub 7- delta /. Reasons for this assumption are examined, and results of both types of anneals are presented. The superconducting behavior of sintered YBa/sub 2/Cu/sub 3/O/sub 7- delta / is limited by weak links. Both the J/sub c/ and AC susceptibility data measure flux motion in the weak links and therefore both of these measurements are appropriate means of assessing the efficiency of oxygenation. The rate of oxygenation at high temperatures is an important factor in determining optimal continuous-cooling anneals. Susceptibility measurements were used to characterize this oxygenation. The presence of a porous silver cladding slows the rate of oxygenation of YBa/sub 2/Cu/sub 3/O/sub 7- delta / but does not change its basic character. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 1652 |
| Ending Page | 1655 |
| Page Count | 4 |
| File Size | 443492 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 27 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1991-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Silver Annealing Optical microscopy Temperature Wire Isothermal processes Magnetic force microscopy Scanning electron microscopy Motion measurement Coatings |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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