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
Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE