Properties of epitaxial films of YBa2Cu3O/sub 7-//sub δ/
- 1. IBM Research Center, P.O. Box 218, Yorktown Heights, New York 10598
Description
We present measurements of the properties of epitaxial thin films of superconducting YBa2Cu3O/sub 7-//sub δ/, with T/sub c/ about 90 K, transition widths of ∼2.5 K, and critical currents in excess of 105A/cm2 at 77 K. The temperature dependence of the upper critical field exceeds 4T/K for fields parallel to the film (i.e., Hperpendicular to the c axis) and the anisotropy of the upper critical field ranged between two and three. Our tunneling gaps (Δ∼15--21 meV) are similar to previous results on ceramic and single-crystal samples of YBa2Cu3O/sub 7-//sub δ/. Infrared measurements of the gap energy suggest a larger value than previous measurements on polycrystalline material. The temperature dependence of the Hall coefficient is similar to that for the bulk
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 36
- Journal Issue
- 16
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 8903-8906
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19040111
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANISOTROPY; BARIUM OXIDES; COPPER OXIDES; CRITICAL CURRENT; CRITICAL FIELD; ENERGY GAP; EPITAXY; EXPERIMENTAL DATA; FILMS; HALL EFFECT; INFRARED RADIATION; MAGNETORESISTANCE; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; TUNNEL EFFECT; ULTRALOW TEMPERATURE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CURRENTS; DATA; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; INFORMATION; MAGNETIC FIELDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIATIONS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS