Reversible magnetic properties of superconducting (Tl,Pb) and
- 1 September 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (9) , 6519-6524
- https://doi.org/10.1103/physrevb.48.6519
Abstract
We have carried out magnetization measurements on superconducting (Tl,Pb) and 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 . The results show that, below 100 K, of (Tl,Pb) decreases slowly as expected by the theoretical calculations whereas of increases slightly. The difference in the temperature dependence of suggests that the fluctuation effect is more significant and extended in due to its higher anisotropy. Additionally, we have extracted the penetration depth λ near again from linear relations of magnetization versus lnH. The λ(T) results are consistent with the behavior expected from BCS theory.
Keywords
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