A New Interpretation of NMR in Quadrupolar Ordering Phase of CeB6- Consistency with Neutron Scattering -

Abstract

The hyperfine coupling between the multipolar moments of the Ce ion and the nucleus of B ion is discussed phenomenologically for the antiferro-quadrupolar ordering (AFQ) phase of CeB ₆ . The longstanding mutual inconsistency between neutron diffraction and NMR in phase II can be resolved by considering the induced octupolar moment with the T _{x y z} type. The experimental facts indicate that the AFQ of the Γ ₅ ⁺ symmetry (i.e. O _{x y} , O _{y z} and O _{z x} types) is realized in CeB ₆ .