Behavior of URu 2 Si 2 in an applied magnetic field

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.