Magnetism and superconductivity in Eu(Ho)Mo/sub 6/S/sub 8/

Journal Article · Mon Apr 15 04:00:00 EST 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.335216· OSTI ID:5997658

Capone, II, D W; Lai Fook, M S; Guertin, R P; Hinks, D G; Dunlap, B D; Foner, S; Abou-Aly, A I; Brooks, J S

A variety of ambient and high-pressure experimental results reveal the interplay between magnetism and superconductivity in Ho-doped samples of the pressure-induced superconductor, EuMo/sub 6/S/sub 8/. Ho concentrations up to 50 at. % of the rare-earth ions were used. High-resolution magnetic measurements are consistent with the crystalline electric field ground state for the Ho/sup 3 +/ ions being a magnetic doublet consisting largely of J/sub z/ = +- 8. The results of high-pressure magnetization experiments reveal negligible effects of reduced lattice constant on the rare earth-rare earth interactions. Resistivity in a 10 at. % sample for P = 10 kbar shows the suppression of a P = 0 structural transition, metallic conductivity down to low temperatures, and finally superconductivity at 8 K. The upper critical field, H/sub c/2(T), for this sample was measured for P = 7, 10, and 12 kbar and showed strong reentrant behavior (dH/sub c/2(T)/dT > 0 as T..-->..0 K). A minimum with field in the resistivity above H/sub c/2 was also observed at lowest temperatures. The H/sub c/2(T) data are compared with those of EuMo/sub 6/S/sub 8/ at high pressure, which show positive curvature, and HoMo/sub 6/S/sub 8/, in which superconductivity is quenched by ferromagnetism at low temperatures.

• Research Organization: Tufts University, Medford, Massachusetts 02155
• OSTI ID: 5997658
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 57:8; ISSN JAPIA
• 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
ALLOYS
ANISOTROPY
CHALCOGENIDES
CHARGED PARTICLES
CRITICAL FIELD
CRYSTAL DOPING
DATA
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EUROPIUM ADDITIONS
EUROPIUM ALLOYS
EUROPIUM COMPOUNDS
EUROPIUM SULFIDES
EXPERIMENTAL DATA
FERROMAGNETISM
HOLMIUM ADDITIONS
HOLMIUM ALLOYS
HOLMIUM COMPOUNDS
HOLMIUM IONS
HOLMIUM SULFIDES
IMPURITIES
INFORMATION
IONS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETISM
MAGNETIZATION
MATERIALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NUMERICAL DATA
PHYSICAL PROPERTIES
PRESSURE EFFECTS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SATURATION
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS