Neutron scattering observations on the magnetic phases of rare-earth ternary superconductors

Journal Article · Thu Mar 01 04:00:00 EST 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.327152· OSTI ID:6189595

Moncton, D E

A number of ternary compounds become superconducting even though they contain a chemically ordered sublattice of magnetic rare-earth ions. Studies of the physical properties of these materials have revealed anomalies below T/sub c/ which have been attributed to magnetic ordering transitions. Using neutron spectrometers at the Brookhaven National Laboratory, a group of us has demonstrated that simple magnetic structures with long-range order do occur, and we have solved some of the magnetic structures of these superconductors. Specifically, we have found that in DyMo/sub 6/S/sub 8/ and TbMo/sub 6/S/sub 8/ an antiferromagnetic structure coexists with superconductivity. In two other compounds, ErRh/sub 4/B/sub 4/ and HoMo/sub 6/S/sub 8/ we have found that the development of ferromagnetism is responsible for the quenching of superconductivity. A study of the critical magnetic neutron scattering near the superconducting ..-->.. ferromagnetic transitions shows the presence of fluctuations into a state with an oscillatory magnetization of wave length lambda=100 A.

• Research Organization: Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 6189595
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:B3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ANTIFERROMAGNETISM
COHERENT SCATTERING
DIFFRACTION
FERROMAGNETISM
FLUCTUATIONS
MAGNETIC PROPERTIES
MAGNETISM
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS
VARIATIONS