Anomalous pressure dependence of superconductivity in the ternary silicide Lu/sub 5/Ir/sub 4/Si/sub 10/

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Appl. Phys. Commun.; (United States)

OSTI ID:6655787

Yang, H D; Shelton, R N

The ternary compound Lu/sub 4/Ir/sub 4/Si/sub 10/, which has a superconducting transition T/sub c/(0) = 3.85 K at ambient pressure, shows a modest linear depression of T/sub c/ with pressure (dT/sub c//dp approx. 10/sup -5/ K/bar) up to a critical pressure P/sub c/ of about 20 kbar. However, for P > P/sub c/, a dramatic discontinuous increase in T/sub c/ occurs which elevates T/sub c/ to about 9 K. Several superconducting pseudoternary compounds, (Lu/sub 1-x/Sc/sub x/)/sub 5/ Ir/sub 4/Si/sub 10/, (Lu/sub 1-x/Er/sub x/)/sub 5/ Ir/sub 4/Si/sub 10/ and Lu/sub 5/(Ir/sub 1-x/Rh/sub x/)/sub 4/ Si/sub 10/ are studied under pressure to investigate the mechanism of the enormous jump in T/sub c/ of Lu/sub 5/Ir/sub 4/Si/sub 10/. It is interpreted that the presence of a sharp feature near the Fermi energy in the electronic density of states is probably primarily responsible for this effect.

• Research Organization: Iowa State Univ., Ames
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6655787
• Report Number(s): CONF-8511278-
• Journal Information: Appl. Phys. Commun.; (United States), Journal Name: Appl. Phys. Commun.; (United States) Vol. 6:1; ISSN APCOD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
COMPLEXES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IRIDIUM COMPOUNDS
LUTETIUM COMPLEXES
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPLEXES
REFRACTORY METAL COMPOUNDS
SILICIDES
SILICON COMPOUNDS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE