Accession Number : ADA134910

Title :   Superconductivity in Hydrogen-Charged Ion-Beam Mixed Palladium Copper Alloy.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB

Personal Author(s) : Scholz,W ; Leiberich,A ; Standish,W J ; Homan,C G

PDF Url : ADA134910

Report Date : Jun 1983

Pagination or Media Count : 21

Abstract : Superconducting PdxCu1-x(H) has been made by ion-beam mixing and low-temperature electrolysis. A multi-layered sample consisting of alternate layers of Cu and Pd, sputter-deposited onto a Pd foil substrate, was bombarded with 125 KeV Xe+ ions. Analysis by Rutherford backscattering (RBS) showed the formation of a Pd.6Cu.4 alloy region approximately 38 micrograms/sq cm thick. After electrolytic charging with H at dry ice temperature, superconductivity was observed, with a transition temperature, Tc, of 11.4 K in the alloy region. The effects of increased currents and changes in the H distribution due to annealing between 77 k and 85 C on the transition curves have been investigated. Transition curves produced in this fashion are broad with an onset of the superconducting transition as high as 14 K. The sample remains partially superconducting even after overnight anneal at room temperature. Electrolysis at room temperature also produces superconducting transitions with onsets as high as 17 K.

Descriptors :   *Palladium alloys, *Copper alloys, *Superconductivity, Fabrication, Ion beams, Mixing, Low temperature, Electrolysis, Transition temperature, Backscattering, Hydrogen

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE