Neutron scattering studies of the paramagnetic response in the mixed-valence alloy Ce/sub 1-//sub x/Th/sub x/ at high energy

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.3092· OSTI ID:6094481

Loong, C; Grier, B H; Shapiro, S M; Lawrence, J M; Parks, R D; Sinha, S K

We report on the inelastic neutron scattering investigations of the cerium ..gamma..bold-arrow-left-right..cap alpha.. valence transition in Ce/sub 0.74/Th/sub 0.26/ at energy transfers up to approx.500 meV. The paramagnetic response across the transition was studied in detail at five temperatures between 10 and 200 K. The obtained magnetic scattering functions consist of a broad peak with a line shape consistent with a generalized relaxational spin dynamics. As the temperature decreases across the transition the magnetic intensity drops sharply, accompanied by an abrupt broadening of the linewidth corresponding to a spin-fluctuation energy much higher than the thermal energy. Within experimental precision, we find no evidence of additional inelastic peaks due to crystal-field excitations. The static single-site susceptibility obtained by a Kramers-Kronig analysis agrees well with the bulk susceptibility. The comparison of the present results with analysis in terms of a ''dense impurity'' model of the f electron in hybridization with the conduction-band states is discussed.

• Research Organization: Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 6094481
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
ANGULAR MOMENTUM
CERIUM ALLOYS
COHERENT SCATTERING
CORRELATIONS
CRYSTAL FIELD
DATA
DIFFRACTION
DYNAMICS
EXPERIMENTAL DATA
FLUCTUATIONS
HYBRIDIZATION
INELASTIC SCATTERING
INFORMATION
KRAMERS-KRONIG CORRELATION
LOW TEMPERATURE
MAGNETISM
MECHANICS
NEUTRON DIFFRACTION
NUMERICAL DATA
PARAMAGNETISM
PARTICLE PROPERTIES
RARE EARTH ALLOYS
SCATTERING
SPIN
TEMPERATURE DEPENDENCE
THORIUM ALLOYS
ULTRALOW TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE