Reversible magnetic properties of superconducting (Tl,Pb)Sr2Ca2Cu3O9 and Tl2Ba2Ca2Cu3O10
D. N. Zheng, A. M. Campbell, R. S. Liu
DOI 10.1103/PhysRevB.48.6519 · Physical Review B
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Abstract
We have carried out magnetization measurements on superconducting (Tl,Pb)Sr2Ca2Cu3O9 and Tl2Ba2Ca2Cu3O10 in the magnetically reversible region, with the applied field parallel to the c axis. By employing a model suggested by Hao et al [Phys. Rev. B 43, 2844 (1991)], the values of the penetration depth, the coherence length, and the critical fields are obtained along with the Ginzburg-Landau parameter κc. The results show that, below 100 K, κc of (Tl,Pb)Sr2Ca2Cu3O9 decreases slowly as expected by the theoretical calculations whereas κc of Tl2Ba2Ca2Cu3O10 increases slightly. The difference in the temperature dependence of κc suggests that the fluctuation effect is more significant and extended in Tl2Ba2Ca2Cu3O10 due to its higher anisotropy. Additionally, we have extracted the penetration depth λ near Tc again from linear relations of magnetization versus lnH. The λ(T) results are consistent with the behavior expected from BCS theory.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (Tl,Pb)Sr2Ca2Cu3O9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 115 | Pressure not reported | unknown |
| (Tl,Pb)Sr2Ca2Cu3O9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 115 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 118 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 118 | Pressure not reported | unknown |
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