Nonequilibrium excitations in superconducting aluminum and high-temperature superconducting devices

This thesis describes work done in two separate areas of the field of superconductivity. The first part describes experiments performed to measure a predicted, but previously unmeasured non-equilibrium effect in superconducting aluminum. A charge imbalance, or charging of the normal fluid with respect to the superfluid, is generated by the interaction of an electric field and a supercurrent. We have shown that this effect does occur, however the measured temperature dependence of this effect does not agree with existing theory. In the second part of this thesis we report on efforts to make simple superconductor devices from the high-T$\sb{\rm c}$ ceramic oxide superconductors. We have made thin films of both $\rm YBa\sb2 Cu\sb3 O\sb{7-x}$ and BiSrCaCuO by several methods, and measurements of bulk film properties are presented. These films have been patterned into different structures in a number of ways, including an in-situ ion milling modification technique. Data on these devices, and grain-boundary SQUIDS are presented.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Hilton, Gene Charles

Contributors dc:contributor

• Van Harlingen, Dale J.

• Physics, Condensed Matter

Statement dc:rights

• Copyright 1989 Hilton, Gene Charles

Language dc:language

eng

Identifier

AAI9010884
(UMI)AAI9010884

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/19198