Temperature dependence of the penetration depth in YBa2Cu3O7-δ measured by microwave ring resonators

H. K. Zeng*, Jenh-Yih Juang, Kaung-Hsiung Wu, T. M. Uen, Y. S. Gou

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


YBa2Cu3O7-(YBCO) superconducting ring resonators with a YBCO ground plane were fabricated using double-side YBCO films deposited on LaAlO3 (LAO) substrates. The temperature dependent London penetration depth, Δλ = λ(T)-λ(5K), was systematically studied by varying the oxygen content of the same resonator structure. For fully oxygenated condition (δ = 0.05), the resonator exhibits a quality factor Q > 104 at 16K, and Δλ(T) displays a linear behavior over a wide range of temperatures. With increasing δ (e.g. δ = 0.2), although Δλ is still linear in temperature, the slope changes by more than a factor of 2. As δ is further increased, Δλ(T) changes from T- to T2-dependence. The results suggest that in the underdoped regime, the incoherent scattering of charged carriers may become increasingly prominent.

Original languageEnglish
Pages (from-to)2669-2670
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume341-348 (IV)
StatePublished - 1 Jan 2000
EventInternational Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA
Duration: 20 Feb 200025 Feb 2000

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