Studies of the Phase Transitions in UAs with Neutron Scattering

Conference · Tue Jan 01 00:00:00 EST 1980 · Physica B+C

DOI:https://doi.org/10.1016/0378-4363(80)90151-5· OSTI ID:5272413

Sinha, S. K.; Lander, G. H.; Shapiro, S. M.; Vogt, O.

Uranium arsenide is known to order with the type-I antiferromagnetic (AF) structure at ≈126 K, and exhibit a first-order transition to the type-IA AF structure at T_N/2. We have now reexamined these transitions with a single crystal. Above T_N UAs exhibits critical scattering suggesting a tendency to order with an incommensurate wavevector, but then suddenly orders with the AF-I structure. The analysis of the data shows the need to consider anisotropic exchange interactions of cubic symmetry between U moments.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Eidgenoessische Technische Hochschule, Zurich (Switzerland). Lab. fuer Festkoerperphysik
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5272413
• Report Number(s): BNL-27566; CONF-800417-3; TRN: 80-013105
• Journal Information: Physica B+C, Vol. 102, Issue 1-3; Conference: European Physicists Society and Swiss National Science Foundation conference, Zurich, Switzerland, 9 Apr 1980
• Publisher: Copyright © 1980 Published by Elsevier B.V.
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
36 MATERIALS SCIENCE
URANIUM ARSENIDES
NEUTRON DIFFRACTION
ANTIFERROMAGNETISM
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
LOW TEMPERATURE
ACTINIDE COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
COHERENT SCATTERING
DIFFRACTION
MAGNETISM
PHASE TRANSFORMATIONS
PNICTIDES
SCATTERING
URANIUM COMPOUNDS
654003* - Radiation & Shielding Physics- Neutron Interactions with Matter
360602 - Other Materials- Structure & Phase Studies