Superconductivity, magnetism, and charge density wave formation in ternary compounds with the Sc/sub 5/Co/sub 4/Si/sub 10/-type structure
Technical Report
·
OSTI ID:6419185
The variation of the superconducting transition temperature T/sub c/ with hydrostatic pressure up to 23.7 kbar is reported for eleven compounds 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/dp approx. 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 above a critical pressure of about 20 kbar to a state with a significantly higher T/sub c/. The resistivity and magnetic susceptibility show an anomaly in Lu/sub 5/Ir/sub 4/Si/sub 10/ and Lu/sub 5/Rh/sub 4/Si/sub 10/ at T/sub 0/ = 83 K and 155 K respectively. It is interpreted that this phase transformation may involve a charge density wave (CDW) formation that opens an energy gap over a portion of the Fermi surface. The P-T phase diagram for Lu/sub 5/Ir/sub 4/Si/sub 10/, given to demonstrate the correlation between T/sub 0/ and T/sub c/, provides the clear evidence that the pressure enhancement of T/sub c/ is due to progressive removal of the charge density wave in crystal. 112 refs., 35 figs., 5 tabs.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6419185
- Report Number(s):
- IS-T-1281; ON: DE87010927
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superconductivity, magnetism, and charge-density wave formation in ternary compounds with the Sc/sub 5/Co/sub 4/Si/sub 10/-type structure
Superconductivity and electronic instability at high pressure in Sc/sub 5/Co/sub 4/Si/sub 10/-type compounds
Anomalous pressure dependence of superconductivity in the ternary silicide Lu/sub 5/Ir/sub 4/Si/sub 10/
Thesis/Dissertation
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:7077722
Superconductivity and electronic instability at high pressure in Sc/sub 5/Co/sub 4/Si/sub 10/-type compounds
Journal Article
·
Mon Mar 31 23:00:00 EST 1986
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:5953298
Anomalous pressure dependence of superconductivity in the ternary silicide Lu/sub 5/Ir/sub 4/Si/sub 10/
Journal Article
·
Tue Dec 31 23:00:00 EST 1985
· Appl. Phys. Commun.; (United States)
·
OSTI ID:6655787
Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPOSITE MATERIALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INFORMATION
IRIDIUM COMPOUNDS
LUTETIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MATERIALS
NUMERICAL DATA
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM COMPOUNDS
SCANDIUM COMPOUNDS
SILICON COMPOUNDS
SUPERCONDUCTING COMPOSITES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPOSITE MATERIALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INFORMATION
IRIDIUM COMPOUNDS
LUTETIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MATERIALS
NUMERICAL DATA
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM COMPOUNDS
SCANDIUM COMPOUNDS
SILICON COMPOUNDS
SUPERCONDUCTING COMPOSITES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE