Fluctuation effects in the magnetic penetration depth of high-Tc films

Thomas R. Lemberger; Eric R. Ulm; K. M. Paget; Vladimir C. Matijasevic

doi:10.1117/12.250283

5 July 1996 Fluctuation effects in the magnetic penetration depth of high-T_c films

Thomas R. Lemberger, Eric R. Ulm, K. M. Paget, Vladimir C. Matijasevic

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250283
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

We do not find evidence for strong fluctuation effects in the magnetic penetration depth of films of YBCO. While in YBCO crystals it has been found that (lambda) ^-3(T) is linear in T below T_c over a range of temperatures from 5K to 15K, (lambda) ^-2(T) is linear over a range of several degrees K just below T_c in YBCO and SmBCO films with very sharp transitions. At low temperatures, we find a T-linear behavior in (lambda) (T) in pure YBCO and SmBCO films. However, we do not find evidence that the T-linear behavior is due to thermal phase fluctuations which should increase in strength as (lambda) (0) increases.

Citation Download Citation

Thomas R. Lemberger, Eric R. Ulm, K. M. Paget, and Vladimir C. Matijasevic "Fluctuation effects in the magnetic penetration depth of high-T_c films", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250283

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