Superconductivity and magnetic interactions in Yb /SUB 1. 2-x/ Eu /SUB x/ Mo/sub 6/S/sub 8/ pseudoternary Compounds

Journal Article · Mon Dec 01 04:00:00 EST 1986 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00684008· OSTI ID:6971865

Torikachvili, M S; Beille, J; Lambert, S E; Maple, M B

The superconducting and magnetic properties of the Yb /SUB 1.2-x/ Eu /SUB x/ Mo/sub 6/S/sub 8/ series of compounds have been investigated by means of ac magnetic susceptibility, electrical resistivity, and upper critical magnetic field H /SUB c2/ measurements. The superconducting transition temperature at ambient pressure is depressed by Eu additions, until superconductivity disappears completely at x about0.7. For Eu concentrations x<0.45, H /SUB c2/ is enhanced at low temperatures and exceeds the values for pure Yb /SUB 1.2/ Mo/sub 6/S/sub 8/. The temperature dependence of H /SUB c2/ for the various Yb /SUB 1.2-x/ Eu /SUB x/ Mo/sub 6/S/sub 8/ compounds is analyzed using a multiple pair-breaking theory that includes the compensation of the applied magnetic field by the negative exchange field produced by antiferromagnetic interactions between the conduction electron spins and the Eu/sup 2 +/ spins (Jaccarino-Peter effect). Hydrostatic pressure was found to induce superconductivity in all Eu-rich compositions that were not superconducting at ambient pressure.

• Research Organization: Lab. Louis Neel, CNRS-USMG, Grenoble
• OSTI ID: 6971865
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 65:5/6; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOY SYSTEMS
ANTIFERROMAGNETISM
CHALCOGENIDES
COUPLING
CRITICAL FIELD
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EUROPIUM
EUROPIUM COMPOUNDS
EUROPIUM SULFIDES
FABRICATION
INTERMEDIATE COUPLING
J-J COUPLING
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
METALLURGICAL EFFECTS
METALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE EARTHS
REFRACTORY METAL COMPOUNDS
SINTERING
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTERBIUM COMPOUNDS
YTTERBIUM SULFIDES