Low Loss Substrates for Microwave Applications and Sol-Gel Processing of Superconductors

Abstract

Systematic studies on low Kappa oxide substrate materials suitable for epitaxial deposition of high Tc superconducting (HTSC) yttrium barium cuprate (YBCO) films and their microwave applications have been carried out. Several promising new hosts such Sr(Al(1/2)Ta(1/2)O3, Sr(Al(1/2)Nb(1/2)O3, and Ba(Mg(1/3)Ta(2/3)O3 in complex oxide perovskite family have been developed. The crystals of these compositions and their associated solid solutions provide new options for ultra low loss, low permittivity substrates with close structural and thermal properties matching to the YBCO. Studies were extended to the twin free perovskites (e.g., modified complex perovskites) with low congruent melting temperatures and alternative compositions with lower dielectric constants (e.g., in spinel, magnetoplumbite, and fluorite structures).

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1994
Accession Number
ADA284868

Entities

People

  • Amar S. Bhalla
  • Leslie Eric Cross
  • Rustum Roy

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Crystal Chemistry
  • Crystal Growth
  • Crystal Structure
  • Crystallization
  • Crystallography
  • Crystals
  • Dielectric Properties
  • Dielectrics
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology
  • Thin Film Deposition Science.