Neutron scattering measurements of spin fluctuations in the heavy-fermion system UPt/sub 3/

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.8523· OSTI ID:5742960

Goldman, A I; Shirane, G; Aeppli, G; Bucher, E; Hufnagl, J

We report the results of both polarized and unpolarized neutron scattering measurements on single-crystal specimens of the heavy-fermion system UPt/sub 3/. At low temperatures (T<30 K), and for the energy scales probed in these measurements (h-dash-bar..omega..approx. =6--8 meV), there is antiferromagnetic short-range order between nearest-neighbor uranium-ion moments located in adjacent basal planes. Such order implies that next-nearest neighbors, located within the same basal plane, are correlated ferromagnetically. As the temperature is raised above 18 K, where the bulk in-plane susceptibility has a maximum, the antiferromagnetic correlations between nearest neighbors disappear. However, the ferromagnetic correlations in the basal plane do not vanish until Tapprox. >150 K.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11793
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5742960
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 36:16
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PLATINUM ALLOYS
NEUTRON DIFFRACTION
SPIN
URANIUM ALLOYS
ANTIFERROMAGNETISM
CORRELATIONS
FERROMAGNETISM
FLUCTUATIONS
HEXAGONAL LATTICES
MAGNETIC SUSCEPTIBILITY
MONOCRYSTALS
POLARIZATION
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ACTINIDE ALLOYS
ALLOYS
ANGULAR MOMENTUM
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
MAGNETIC PROPERTIES
MAGNETISM
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
SCATTERING
VARIATIONS
360104* - Metals &amp; Alloys- Physical Properties