Accession Number : ADA324403

Title :   High Tc Superconductivity in the Triple-Perovskite La-Rare Earth or Alkali Metal-Ba-Ca-Mg or Cd-Cu-Oxide System.

Descriptive Note : Technical rept. Jan-Dec 96,

Corporate Author : ARMY RESEARCH LAB FORT MONMOUTH NJ

Personal Author(s) : Tauber, Arthur ; Tidrow, Steven C. ; Pierce, Daniel ; Eckart, Donald W.

PDF Url : ADA324403

Report Date : MAR 1997

Pagination or Media Count : 11

Abstract : Bulk targets of compounds in the system La(3-z)Me(z)Ba3Ca(1-v)Nc(sub v)Cu7O(16+v) where Me=rare earth or Na and Nc=Mg or Cd were prepared by solid state reactions. They were employed to deposit by pulse laser deposition thin films of the superconductor on single crystal substrates of LaA103, LSAT, and GGG. Phase relationships and orientation relationships were obtained from diffractometer scans. All compounds exhibited a (00l) relationship with all substrates. Lattice parameters, transition temperatures and widths are reported for each superconducting compound. All substituted compounds were superconducting but no increase in Tc was observed for any. All thin films heated to 750 deg C desorbed little oxygen compared to YBCO.

Descriptors :   *HIGH TEMPERATURE SUPERCONDUCTORS, *RARE EARTH ELEMENTS, *LANTHANUM, *SUPERCONDUCTIVITY, *ALKALI METALS, *PEROVSKITES, SCANNING, MAGNESIUM, CALCIUM, REACTION KINETICS, THIN FILMS, SINGLE CRYSTALS, SUBSTRATES, TARGETS, OXYGEN, TRANSITION TEMPERATURE, OXIDES, COPPER, CADMIUM, BARIUM, SOLID STATE PHYSICS, INORGANIC COMPOUNDS, DIFFRACTOMETERS.

Subject Categories : Inorganic Chemistry
      Electricity and Magnetism
      Thermodynamics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE