Electrical resistivity, thermal expansion, and magnetization of ${\mathrm{URu}}_2{\mathrm{Si}}_2$ in an applied magnetic field are analyzed within a model based on quadrupolar ordering of U ions with localized $f$ electrons. This model, which had been shown to be consistent with macroscopic properties in a field tending to zero, can be used to account for the observed behavior in a finite field.

• Received 11 September 1997

DOI:https://doi.org/10.1103/PhysRevB.57.5191