Published March 20, 1995
| Version v1
Journal article
Strong, asymmetric flux pinning by miscut-growth-initiated columnar defects in epitaxial YBa2Cu3O7-x films
Creators
- 1. Metals and Ceramics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831 (United States)
- 2. Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831 (United States)
Description
Strong flux pinning and a pronounced asymmetric angular dependence of Jc(H,θ) have been discovered in YBa2Cu3O7-x films grown on miscut, mosaic LaAlO3 substrate surfaces. A new pinning peak, which at low fields is nearly as strong as the ''intrinsic pinning,'' is observed for magnetic field orientations between the c axis and the CuO2 plane. Cross-section transmission electron microscopy reveals columnar growth defects (2--3 nm diameter) aligned near the c axis, in concentrations ∼1010 cm-2. The results demonstrate that deliberately modified substrate surfaces may introduce technologically useful flux pinning in YBa2Cu3O7-x films
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 74
- Journal Issue
- 12
- Journal Page Range
- p. 2355-2358.
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26046642
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANISOTROPY; BARIUM OXIDES; COPPER OXIDES; CRITICAL CURRENT; CRYSTAL DEFECTS; EPITAXY; HIGH-TC SUPERCONDUCTORS; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY; VORTICES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; CURRENTS; ELECTRIC CURRENTS; ELECTRON MICROSCOPY; FILMS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS