High Temperature Superconductivity
Abstract
The overall goals of this program are to develop the technology of MBE growth of HTSC material, to optimize the performance of HTSC films with high transition temperatures and critical current densities, and to explore the development of electronic devices based on such material. In-situ growth of (BiO)2-containing HTSC material was obtained. Attempts are being made to perfect the process in order to improve the superconducting properties of the films. (BiO)2 containing layered superconducting films grown in-situ at low temperature were obtained without any post-growth anneal. This result was obtained recently on two films grown under nominally identical conditions using ozone as a source of active oxygen. To our knowledge, these are the first films from the (BiO)2 family grown in-situ by an evaporative technique, and the first such films grown in-situ by any technique in the U.S. The films were grown on SiTiO3 by atomic layer epitaxy (ALE) and exhibited a streaky RHEED pattern throughout growth, indicating the heteroepitaxy of a single-crystal-like and atomically smooth layer. X-ray diffraction analysis revealed the films to be completely aligned, as layered by the beam-shuttering sequence, and nearly single phase. (jhd)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1989
- Accession Number
- ADA215491
Entities
People
- James N. Eckstein