Accession Number:

ADA277265

Title:

The Charging Effect in High-T sub c Superconducting Thin Films

Descriptive Note:

Final rept. 1 Nov 1991-31 Dec 1993

Corporate Author:

ROCHESTER UNIV NY DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1994-01-01

Pagination or Media Count:

11.0

Abstract:

Experimental research has been conducted to elucidate the basic physics and possible applications of the charging effect in partially oxygen- depleted YBa2Cu3O6x YBCO thin films. A novel laser-writing technique, suitable for patterning and fabrication of monolithic YBCO electronic devices has been developed. The technique allows to define superconducting and insulating regions in the same sample and is based on local laser beam heating of the epitaxial YBCO film in either the presence or the absence of an oxygen atmosphere. Several test structures for our charging-effect experiments have been fabricated using laser writing. The structures are fully monolithic with a partially oxygen-depleted channel and oxygen-rich source and drain electrodes. The devices were tested and showed a substantial charging effect, which we associate with the charge-transfer effects related to electric-field-enhanced changes of the crystalline order in oxygen-deficient YBCO. We have also fabricated and successfully tested laser-written YBCO microwave transmission structures and resonators. The developed devices represent a new approach for the high-temperature superconducting electronics, which consists of exploiting contrasting properties of the oxygen-poor and oxygen-rich YBCO phases to design novel devices. Superconducting electronics, High temperature superconductivity, Charging effect, Laser-writing technique, Superconducting three-terminal devices.

Subject Categories:

  • Physical Chemistry
  • Electricity and Magnetism
  • Solid State Physics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE