Accession Number:

ADA244386

Title:

Electrochemically Modulated Superconductivity

Descriptive Note:

Final technical rept. 1 Mar 90-31 Aug 91,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE MATERIALS PROCESSING CENTER

Personal Author(s):

Report Date:

1991-11-26

Pagination or Media Count:

22.0

Abstract:

The goal of this project was to test the feasibility of electrochemically modulated superconductivity in the cuprate superconductors. Such a test is possible because the new high temperature superconductors are ionic solids that are extremely sensitive to oxygen potential. Passive optimization of the latter is impossible, not only due to materials processing limitations but also due to thermodynamic and structural instabilities. Our approach is active intervention by electrochemical means, in other words, electrochemical polarization while the material is actually or potentially in the superconducting state. This requires electrolytes that are functional at cryogenic temperatures. Several years ago we discovered cryogenic electrolysis and demonstrated the existence of such remarkable media. Success in this effort would make possible a new class of electronic and photonic devices that exploit the capability to control actively the transition into and out of the superconducting state while the material is in service. A cuprate-based superconductor is polarized electrochemically in a cryogenic electrolyte while the electrical resistivity is measured simultaneously.

Subject Categories:

  • Physical Chemistry
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE