Neutron diffraction study of magnetic order in the ternary superconductor ErMo/sub 6/Se/sub 8/

Journal Article · Wed Mar 01 04:00:00 EST 1978 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.325001· OSTI ID:5048908

Lynn, J W; Moncton, D E; Shirane, G; Thomlinson, W; Eckert, J; Shelton, R N

Development of new ternary superconductors has led to materials which also show a strong tendency toward magnetic order when one of the constituent elements is a rare earth. Powder neutron diffraction data on superconducting (T/sub s/approx.6 K) samples of ErMo/sub 6/Se/sub 8/ taken in the temperature range 0.05--2.0 K show that magnetic Bragg peaks develop at T/sub M/=1.1 K, in agreement with specific heat studies. However, it is not possible to index these new reflections using a simple antiferromagnetic unit cell based on the ErMo/sub 6/Se/sub 8/ lattice. It is also not possible to index the magnetic reflections based on a single modulation vector, or with a modulation vector along a high symmetry direction including higher order harmonics. Thus either the long range magnetic order corresponds to a more complicated magnetic structure in the ErMo/sub 6/Se/sub 8/ lattice, or at least some of the peaks develop in impurity phases. These results are compared with the recent neutron data on the reentrant superconductors HoMo/sub 6/Se/sub 8/ and ErRh/sub 4/B/sub 4/, in which the development of ferromagnetic order is clearly shown to be responsible for quenching the superconductivity.

• Research Organization: Department of Physics, University of Maryland, College Park, Maryland 20742
• OSTI ID: 5048908
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ANTIFERROMAGNETISM
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ERBIUM COMPOUNDS
ERBIUM SELENIDES
IMPURITIES
MAGNETIC PROPERTIES
MAGNETISM
MOLYBDENUM COMPOUNDS
MOLYBDENUM SELENIDES
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SELENIDES
SELENIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS