Magnetic field-induced superconductivity in the ferromagnetic state of HoMo/sub 6/S/sub 8/

Journal Article · Tue Dec 01 04:00:00 EST 1987 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683331· OSTI ID:5739669

Giroud, M; Genicon, J L; Tournier, R; Geantet, C; Pena, O; Horyn, R; Sergent, M

The Chevrel-phase HoMo/sub 6/S/sub 8/ is one of the few known ferromagnetic reentrant superconductors, having an upper superconductive critical temperature T/sub c1/ = 1.78 K, a Curie temperature T/sub m/ = 0.75 K, and reentering into a normal ferromagnetic state below T/sub c2/ = 0.64 K. After a brief survey of the characteristic properties of HoMo/sub 6/S/sub 8/, they present new results obtained by simultaneous resistance and magnetization measurements on a single crystal of HoMo/sub 6/S/sub 8/, performed in the whole temperature range 35mK less than or equal to T less than or equal to 4.2 K and for several orientations of the easy magnetization axis with respect to the applied magnetic field. Magnetic field-induced superconductive transitions are observed well below T/sub c2/ in the ferromagnetic state. Those transitions can be understood as the first experimental observation of a purely electromagnetic effect earlier suggested by Ginzburg: if the internal field is antiparallel to the spontaneous magnetization, the magnetic induction may be reduced below its critical value and a superconductive transition may take place. It is possible if exchange interactions are negligible; their results concerning the anisotropy of the internal upper critical field H/sub c2/ are consistent with that requirement. They also discuss the possible origins for the low-resistance state in zero field: it might be due to domain wall superconductivity.

• Research Organization: CNRS, Grenoble, France
• OSTI ID: 5739669
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 69:5-6; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360603* -- Materials-- Properties
CHALCOGENIDES
DIAGRAMS
DOMAIN STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HOLMIUM COMPOUNDS
HOLMIUM SULFIDES
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MAGNETIZATION
MAGNETORESISTANCE
MATERIALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE