Q dependence of the magnetic response in URu/sub 2/Si/sub 2/
We have performed inelastic neutron-scattering experiments with E/sub 0/ = 12.7 meV on the superconducting heavy-fermion system URu/sub 2/Si/sub 2/ in the temperature range 5--50 K. The main feature of the magnetic response is an inelastic excitation at a few meV. The intensity of the magnetic scattering shows a chemically bondQchemically bond dependence which we will discuss for temperatures above and below the Neel temperature T/sub N/ = 17.5 K. From the neutron-scattering data one can extract a local magnetic susceptibility, which shows strong spatial correlations even above T/sub N/. These correlations are mainly visible in the <101> direction. The Van Vleck term of the local susceptibility corresponding to the inelastic excitation shows a clear peak at the Neel temperature, in contrast to a weak kink in the static bulk susceptibility.
- Research Organization:
- II. Physikalisches Institut, Universitaet zu Koeln, D-5000 Koeln 41, Federal Republic of Germany
- OSTI ID:
- 6441457
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
COHERENT SCATTERING
CORRELATIONS
CRYSTALS
DIFFRACTION
FUNCTIONS
INELASTIC SCATTERING
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NEEL TEMPERATURE
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
POLYCRYSTALS
REFRACTORY METAL COMPOUNDS
RESPONSE FUNCTIONS
RUTHENIUM COMPOUNDS
RUTHENIUM SILICIDES
SCATTERING
SILICIDES
SILICON COMPOUNDS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
URANIUM COMPOUNDS
URANIUM SILICIDES
VERY LOW TEMPERATURE