Abstract
The long-range planar-type antiferromagnetic ordering in the heavy-fermion compound is shown to critically depend on the exact occupation and distribution of aluminum atoms over their available lattice sites. A poly-crystalline sample (=2.7 K) is systematically compared with a nonordering single crystal, by means of susceptibility, specific heat, and site-specific Al-NQR/NMR experiments. Implications for other Al-containing heavy-fermion systems are discussed.
- Received 30 November 1993
DOI:https://doi.org/10.1103/PhysRevB.49.15759
©1994 American Physical Society