Effects of pressure on the structural and superconducting properties of Nb/sub 3/As, Nb/sub 3/Si, Nb/sub 3/Ge, and Nb/sub 0. 82/Ge/sub 0. 18/

Journal Article · Sat Dec 01 04:00:00 EST 1979 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.20.4538· OSTI ID:5662066

Skelton, E F; Gubser, D U; Willis, J O; Hein, R A; Yu, S C; Spain, I L; Waterstrat, R M; Sweedler, A R

The effects of pressure on both the structure and superconducting transition temperatures (T/sub c/) of several Nb-based compounds are examined. Comparisons are made between the Ti/sub 3/P-structure type, in which Nb/sub 3/As and Nb/sub 3/Si normally crystallize, and the A-15 structure in which Nb/sub 3/Ge and many other high-T/sub c/ materials form. A comparison is also made between stoichiometric and nonstoichiometric forms of the A-15 structure. The compressibilities are measured under hydrostatic pressures to about 6 GPa; the pressure dependences of T/sub c/ are measured to about 10 GPa for the As and Si compounds and to about 1 GPa for the Ge compounds. The structural and electrical measurements are combined and the volume dependences of T/sub c/ are reported and compared. Considerations are given to the possibility of a pressure-induced transition from the Ti/sub 3/P type to the A-15 structure for the As and Si compounds.

• Research Organization: Naval Research Laboratory, Washington, DC 20375
• OSTI ID: 5662066
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 20:11; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ARSENIC COMPOUNDS
ARSENIDES
COMPRESSIBILITY
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GERMANIUM COMPOUNDS
MECHANICAL PROPERTIES
NIOBIUM COMPOUNDS
NIOBIUM SILICIDES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PNICTIDES
PRESSURE DEPENDENCE
SILICIDES
SILICON COMPOUNDS
STOICHIOMETRY
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE