Evidence of a magnetic gaplike excitation in URu/sub 2/Si/sub 2/

Journal Article · Sun Jun 01 00:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.7875· OSTI ID:5540790

Walter, U; Loong, C; Loewenhaupt, M; Schlabitz, W

We report the observation of a sharp gaplike magnetic excitation at low temperatues by inelastic neutron scattering in the heavy-fermion 5f system URu/sub 2/Si/sub 2/. At T = 10 K this sharp excitation occurs at an energy transfer of 5.5 meV and has a Lorentzian relaxational-type tail at higher-energy transfer. The gap rapidly disappears as the sample is heated and at T = 50 K the response function consists of only one quasielastic line. The Q dependence of the low-temperature peak suggests that antiferromagnetic correlations are important.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5540790
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:11; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ACTINIDE COMPOUNDS
AMPLITUDES
ANTIFERROMAGNETISM
COHERENT SCATTERING
CRYSTALS
DATA
DIFFRACTION
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
FUNCTIONS
INELASTIC SCATTERING
INFORMATION
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETISM
NEUTRON DIFFRACTION
NUMERICAL DATA
PHYSICAL PROPERTIES
POLYCRYSTALS
REFRACTORY METAL COMPOUNDS
RESPONSE FUNCTIONS
RUTHENIUM COMPOUNDS
RUTHENIUM SILICIDES
SCATTERING
SCATTERING AMPLITUDES
SILICIDES
SILICON COMPOUNDS
TEMPERATURE DEPENDENCE
TIME-OF-FLIGHT METHOD
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
URANIUM COMPOUNDS
URANIUM SILICIDES
VERY LOW TEMPERATURE