Abstract
Neutron diffraction measurements have been performed on the cubic compound in a [001] magnetic field to examine the quadrupolar ordering. Antiferromagnetic components with , () () are observed below the transition temperature (0.4 K at ) whose amplitudes vary linear with and vanish at zero field, providing the first evidence for a modulated quadrupolar phase. For , a nonsquare modulated state persists even below 100 mK suggesting quadrupole moments associated with a doublet ground state to be partially quenched by hybridization with conduction electrons.
- Received 12 November 2004
DOI:https://doi.org/10.1103/PhysRevLett.94.197201
©2005 American Physical Society