The influence of ion-irradiated induced disorder and post-annealing on thin film superconductive compounds MoN, VN, and TiN

Conference · Mon Jun 01 04:00:00 EDT 1987

OSTI ID:6417540

Christen, D K; Ellis, J T; Sekula, S T; Thompson, J R; Lewis, J D; Anderson, W R; Pennycook, S J

Thin films of the three superconducting ordered compounds MoN, VN, and TiN have been synthesized by high temperature gas reaction of the pure metal films in a nitrogen-rich atmosphere. X-ray diffraction showed that the as-formed films were single phase, with VN and TiN having the B1 structure and MoN having a modified simple hexagonal structure. Lattice disorder was introduced systematically by irradiation with nitrogen ions of energies 45 and 340 keV, resulting in nearly uniform damage profiles over the film thickness. Both the residual resistivity rho/sub 0/ and the superconducting transition temperature T/sub c/ are exponentially saturating functions of the ion fluence, with decay constants and saturation values that correlate with the relative stabilities of the three materials. Isochronal annealing of the samples in a nitrogen-rich environment results in recovery of the properties. Annealing in vacuum leads to first recovery and then progressive decomposition of the compounds.

• Research Organization: Oak Ridge National Lab., TN (USA); Tennessee Univ., Knoxville (USA). Dept. of Physics; Carleton Coll., Northfield, MN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6417540
• Report Number(s): CONF-8706125-8; ON: DE87012525
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
BEAMS
CHARGED PARTICLES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY RANGE
FILMS
HEAT TREATMENTS
ION BEAMS
IONS
KEV RANGE
MOLYBDENUM COMPOUNDS
MOLYBDENUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
NITROGEN IONS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
PNICTIDES
RADIATION EFFECTS
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VANADIUM COMPOUNDS
VANADIUM NITRIDES