Nature of the order parameter in the heavy-fermion system
- 18 October 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 71 (16) , 2630-2633
- https://doi.org/10.1103/physrevlett.71.2630
Abstract
The weak order parameter observed below the 17.5 K transition in has been variously attributed to magnetic dipoles, quadrupoles, or octupoles. By polarized neutron scattering we show that the order parameter breaks time reversal invariance and so cannot be quadrupolar or a spin nematic. Of the five dipolar and octupolar order parameters that are then allowed by symmetry, polarization analysis reveals that only the spin dipole, , orders at the transition.
Keywords
This publication has 12 references indexed in Scilit:
- Possibility of observation of nontrivial magnetic order by elastic neutron scattering in magnetic fieldPhysical Review Letters, 1993
- Nontrivial magnetic order: Localized versus itinerant systemsPhysical Review Letters, 1992
- Spin Correlators and Weak Antiferromagnetism in Heavy FermionsEurophysics Letters, 1991
- X-ray magnetic scattering in antiferromagneticPhysical Review Letters, 1990
- Neutron-scattering measurements of long-range antiferromagnetic order inPhysical Review Letters, 1990
- Antiferromagnetism and superconductivity in URu2Si2Physica B: Condensed Matter, 1990
- Horizontal field magnet cryostat and specimen positioning assembly for neutron scattering experimentsReview of Scientific Instruments, 1989
- Magnetic excitations and ordering in the heavy-electron superconductorPhysical Review Letters, 1987
- Superconductivity and magnetic order in a strongly interacting fermi-system: URu2Si2Zeitschrift für Physik B Condensed Matter, 1986
- Superconducting and Magnetic Transitions in the Heavy-Fermion System UPhysical Review Letters, 1985