Accession Number : ADA195279

Title :   Synthesis and Study of Materials for Superconducting Electronics.

Descriptive Note : Final rept. 1 Oct 84-30 Sep 87,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Tedrow, P M ; Meservey, R ; Orlando, T P

PDF Url : ADA195279

Report Date : 27 Mar 1988

Pagination or Media Count : 16

Abstract : Study of high-Tc superconductors in single-crystal and thin film form has begun. Investigation of semiconductor tunnel barriers has led to improvement of their theoretical description. Transport measurements of layered films of transition metal nitrides showed evidence of spin-orbit scattering and dimensional crossover effects. A technique for analyzing tunneling conductances to obtain the amount of Zeeman splitting using Fourier transforms has been developed and applied to V3Ga tunneling data. Spin-orbit scattering rates measured by two independent techniques, spin-polarized tunneling and magnetoresistance, have been shown to be similar. The strength of Fermi-liquid corrections on the effective magnetic moment of conduction electrons in vanadium and gallium has been found using spin-polarized tunneling. The effect of spin-orbit scattering on the density of states of superconducting thin films has been measured. The superconducting properties of ultra-thin niobium films were studied.

Descriptors :   *SUPERCONDUCTORS, *THIN FILMS, *TUNNELS, *SINGLE CRYSTALS, BARRIERS, CONDUCTIVITY, ELECTRICAL CONDUCTIVITY, ELECTRONICS, ELECTRONS, FILMS, FOURIER TRANSFORMATION, GALLIUM, LAYERS, MAGNETIC MOMENTS, MAGNETORESISTANCE, MATERIALS, MEASUREMENT, NIOBIUM, NITRIDES, ORBITS, RATES, SCATTERING, SEMICONDUCTORS, SPINNING(MOTION), SPLITTING, SUPERCONDUCTIVITY, SYNTHESIS, TRANSITION METALS, TRANSPORT, TUNNELING, VANADIUM, ZEEMAN EFFECT, TRANSPORT PROPERTIES, TUNNELING(ELECTRONICS), JUNCTIONS, YTTRIUM OXIDES, BARIUM OXIDES, COPPER COMPOUNDS

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE