Crossover in temperature dependence of penetration depth [lambda]([ital T]) in superconducting YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] films
- Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The [ital ab]-plane penetration depth [lambda]([ital T]) in twinned YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] films exhibits a crossover in its [ital T] dependence at 25 K. Below 25 K, [delta][lambda][equivalent to][lambda]([ital T])[minus][lambda](0)[proportional to][ital T][sup 2]. This differs from recent measurements on a crystal which find [delta][lambda][proportional to][ital T] below 40 K. Above 25 K, the normalized data [lambda]([ital T]/[ital T][sub [ital c]])/[lambda](0) vs [ital T]/[ital T][sub [ital c]] for our films agree extremely well with the crystal data, including quasilinear behavior between 25 and 40 K. Differences and similarities of films and crystals agree well with a theory of slightly disordered [ital d]-wave superconductors.
- OSTI ID:
- 7277420
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:5; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
FILMS
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES