5 July 1996 Fluctuation effects in the magnetic penetration depth of high-Tc films
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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 Tc over a range of temperatures from 5K to 15K, (lambda) -2(T) is linear over a range of several degrees K just below Tc 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.
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Thomas R. Lemberger, Thomas R. Lemberger, Eric R. Ulm, Eric R. Ulm, K. M. Paget, K. M. Paget, Vladimir C. Matijasevic, Vladimir C. Matijasevic, } "Fluctuation effects in the magnetic penetration depth of high-Tc films", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); doi: 10.1117/12.250283; https://doi.org/10.1117/12.250283

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