Magnetic ordering in rare-earth ternary superconductors

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6125130

Shirane, G; Thomlinson, W; Moncton, D E

A review is given of current neutron scattering studies of rare-earth(R) ternary superconductors: RMo/sub 6/X/sub 8/(X = S or Se) and ErRh/sub 4/B/sub 4/. Most of these compounds develop antiferromagnetic long-range order which coexists microscopically with superconductivity. Two compounds, HoMo/sub 6/S/sub 8/ and ErRh/sub 4/B/sub 4/, become ferromagnetic causing the destruction of superconductivity. In ErRh/sub 4/B/sub 4/, both superconducting and ferromagnetic regions are simultaneously present between 0.9 and 1.2/sup 0/K but microscopic coexistence is not indicated. However, in this temperature range, magnetic fluctuations occurring in the superconducting regions take the forms of a magnetic spiral with a wavelength of approx. 100 A in order to accommodate superconductivity. This observation is in good agreement with the theoretical predictions of Blount and Varma.

• Research Organization: Brookhaven National Lab., Upton, NY (USA); Bell Labs., Murray Hill, NJ (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 6125130
• Report Number(s): BNL-26379; CONF-790653-7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
656102* -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
FERROMAGNETISM
INTERMETALLIC COMPOUNDS
MAGNETIC FIELDS
MAGNETISM
MICROSTRUCTURE
NEUTRON DIFFRACTION
RARE EARTH ALLOYS
SCATTERING
SUPERCONDUCTORS
ULTRALOW TEMPERATURE