Superconducting and magnetic interactions in La/sub 1. 2-x/Eu/sub x/Mo/sub 6/S/sub 8/ pseudoternary compounds

Journal Article · Mon Mar 01 04:00:00 EST 1982 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.330916· OSTI ID:5457993

Torikachvili, M S; Maple, M B; Guertin, R P; Foner, S

Superconducting and magnetic properties of La/sub 1.2-x/Eu/sub x/Mo/sub 6/S/sub 8/ pseudoternary compounds were investigated by means of low-frequency ac and dc magnetic susceptibility measurements under hydrostatic pressure up to 20 kbar and in magnetic fields up to 10 T. At atmospheric pressure, the superconducting transition temperature T/sub c/ is a weak function of Eu concentration x for 0< or =x< or =0.2, and decreases smoothly with x for x>0.2, until it vanishes for x> or approx. =0.95. Hydrostatic pressure was found to lower T/sub c/ in the La-rich compounds and to increase T/sub c/ in the Eu-rich compounds. Pressure also induces superconductivity in compounds with x>0.95 which are not superconducting at atmospheric pressure with maximum T/sub c/'s that are quite high (approx.8 K, midpoint) and comparable to the T/sub c/ values of other ternary molybdenum sulfides with divalent metal atoms. Magnetization data (dc) on a La/sub 0.2/Eu/sub 1.0/Mo/sub 6/S/sub 8/ compound revealed a sizable Meissner effect for pressures >7 kbar. At atmospheric pressure, the upper critical magnetic field H/sub c2/ for 0

• Research Organization: Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093
• OSTI ID: 5457993
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 53:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
&amp; Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EUROPIUM ALLOYS
LANTHANUM ALLOYS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MEISSNER-OCHSENFELD EFFECT
MOLYBDENUM ALLOYS
NONMETALS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH ALLOYS
SULFUR
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE