Uranium nitride: a cubic antiferromagnet with anisotropic critical behavior

Conference · Tue Nov 01 04:00:00 EST 1977

OSTI ID:5312432

Buyers, W J.L.; Holden, T M; Svensson, E C; Lander, G H

Highly anisotropic critical scattering associated with the transition at T/sub N/ = 49.5 K to the type-I antiferromagnetic structure has been observed in uranium nitride. The transverse susceptibility is found to be unobservably small. The longitudinal susceptibility diverges at T/sub N/ and its anisotropy shows that the spins within the (001) ferromagnetic sheets of the (001) domain are much more highly correlated than they are with the spins lying in adjacent (001) sheets. The correlation range within the sheets is much greater than that expected for a Heisenberg system with the same T/sub N/. The rod-like scattering extended along the spin and domain direction is reminiscent of two-dimensional behavior. The results are inconsistent with a simple localized model and may reflect the itinerant nature of the 5f electrons.

• Research Organization: Atomic Energy of Canada Ltd., Chalk River, Ontario; Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5312432
• Report Number(s): CONF-771080-2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
ANISOTROPY
ANTIFERROMAGNETISM
COHERENT SCATTERING
DIFFRACTION
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
NEUTRON DIFFRACTION
NITRIDES
NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
URANIUM COMPOUNDS
URANIUM NITRIDES