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Title: Uranium nitride: a cubic antiferromagnet with anisotropic critical behavior

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Atomic Energy of Canada Ltd., Chalk River, Ontario; Argonne National Lab., IL (USA)
OSTI Identifier:
5312432
Report Number(s):
CONF-771080-2
TRN: 78-005329
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: International symposium on neutron inelastic scattering, Vienna, Austria, 17 Oct 1977
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; URANIUM NITRIDES; ANTIFERROMAGNETISM; ANISOTROPY; MAGNETIC SUSCEPTIBILITY; NEUTRON DIFFRACTION; TRANSITION TEMPERATURE; ACTINIDE COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; MAGNETIC PROPERTIES; MAGNETISM; NITRIDES; NITROGEN COMPOUNDS; PHYSICAL PROPERTIES; PNICTIDES; SCATTERING; THERMODYNAMIC PROPERTIES; URANIUM COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Buyers, W J.L., Holden, T M, Svensson, E C, and Lander, G H. Uranium nitride: a cubic antiferromagnet with anisotropic critical behavior. United States: N. p., 1977. Web.
Buyers, W J.L., Holden, T M, Svensson, E C, & Lander, G H. Uranium nitride: a cubic antiferromagnet with anisotropic critical behavior. United States.
Buyers, W J.L., Holden, T M, Svensson, E C, and Lander, G H. Tue . "Uranium nitride: a cubic antiferromagnet with anisotropic critical behavior". United States. https://www.osti.gov/servlets/purl/5312432.
@article{osti_5312432,
title = {Uranium nitride: a cubic antiferromagnet with anisotropic critical behavior},
author = {Buyers, W J.L. and Holden, T M and Svensson, E C and Lander, G H},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 1977},
month = {Tue Nov 01 00:00:00 EST 1977}
}

Conference:
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