Pinning energies of oxygen deficient YBCO using time dependent AC susceptibility measurements
✍ Scribed by H.B. Sun; K.N.R. Taylor; G.J. Russell
- Book ID
- 103946493
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 288 KB
- Volume
- 205
- Category
- Article
- ISSN
- 0921-4534
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✦ Synopsis
By observing the time decay of the AC susceptibility after an external field is removed from the sample, we have been able to determine the temperature dependence of the pinning energies in several oxygen deficient samples of YBCO. The time scale of the measurements extended from 100 ms to 2000 s and showed a very fast initial decay lasting for less than 1 s followed by a slower relaxation which continued for the rest of the observational period. The nature of the initial decay is still not understood; however, the longer time decay has a logarithmic form and has been used in the determination of the pinning energies.