Magnetic penetration depth in high-T{sub c} superconducting Tl{sub 2}Ca{sub 1}Ba{sub 2}Cu{sub 2}O{sub 8-{delta}} single crystals
- Univ. of South Carolina, Columbia, SC (United States)
- Univ. of Colorado, Boulder, CO (United States)
The temperature dependence of Cu-O plane magnetic penetration depth, {lambda}{sub ab}(T), for Tl-2122 single crystals has been determined by measuring the low-field d.c. magnetization using a SQUID susceptometer. Almost full (97%) diamagnetism at low temperature was reached by carefully minimizing the background field, which is an essential condition for this method. {lambda}{sub ab}(0) was obtained uniquely by a self-consistent condition to be 182 nm. Results of our measurements show a deviation from the single-band BCS s-wave prediction. The exponential behavior in very limited temperature regions may be reconciled with the BCS-like prediction. However, our {lambda}(T) data follow the theoretical prediction very accurately for a p-wave polar state pairing. 12 refs., 4 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 171560
- Journal Information:
- Journal of Superconductivity, Vol. 5, Issue 6; Other Information: PBD: Dec 1992
- Country of Publication:
- United States
- Language:
- English
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