Magnetic excitations in uranium nitride
The magnetic inelastic scattering from uranium nitride in the antiferromagnetic and paramagnetic phases has been measured by neutron spectroscopy. The magnetic response at low temperatures is found to be spread over a considerable frequency range and to have longitudinal polarization. No sharp transverse spin-wave modes are observed even though uranium nitride orders antiferromagnetically. With the raising of the temperature towards the Neel temperature, a second longitudinal component of inelastic scattering centered on zero frequency grows rapidly and dominates the low-frequency response. However, at frequencies beyond 5--6 THz there is virtually no change in the observed magnetic scattering.
- Research Organization:
- Chalk River Nuclear Laboratories, Atomic Energy of Canada Limited, Chalk River, Ontario, Canada K0J1J0
- OSTI ID:
- 6494625
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 30:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
ANTIFERROMAGNETISM
DATA
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
INELASTIC SCATTERING
INFORMATION
MAGNETIC PROPERTIES
MAGNETISM
NEEL TEMPERATURE
NEUTRON SPECTROSCOPY
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PARAMAGNETISM
PHYSICAL PROPERTIES
PNICTIDES
SCATTERING
SPECTROSCOPY
SPIN WAVES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
URANIUM COMPOUNDS
URANIUM NITRIDES