Superconductivity and electronic instability at high pressure in Sc/sub 5/Co/sub 4/Si/sub 10/-type compounds

Journal Article · Tue Apr 01 04:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.5062· OSTI ID:5953298

Yang, H D; Shelton, R N; Braun, H F

The variation of the superconducting transition temperature (T/sub c/) with hydrostatic pressure up to 23.7 kbar is reported for eleven ternary silicides and germanides with the Sc/sub 5/Co/sub 4/Si/sub 10/-type structure. Most of these compounds display a modest linear depression of T/sub c/ with pressure (dT/sub c//dpapprox.10/sup -5/ K/bar); however, two materials, Lu/sub 5/Ir/sub 4/Si/sub 10/ and Lu/sub 5/Rh/sub 4/Si/sub 10/, undergo a discontinuous transformation to a state with a significantly higher T/sub c/ above a critical pressure of about 20 kbar. For Lu/sub 5/Ir/sub 4/Si/sub 10/, the pressure-enhanced T/sub c/ of 9.12 K is the highest transition temperature reported for this class of compounds.

• Research Organization: Ames LaboratoryU.S. Department of Energy and Department of Physics, Iowa State University, Ames, Iowa 50011
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5953298
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GERMANIUM COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
SILICIDES
SILICON COMPOUNDS
STABILITY
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VERY HIGH PRESSURE