Neutron diffraction study of PuSb: The critical regime

Neutron diffraction measurements on a large single crystal of ${}_{}{}^{242}{}_{}{}^{}\mathrm{PuSb}$ have been performed near $T_N$=85.3 K to measure the development of long-range magnetic order (β=0.31±0.02) below $T_N$ and the anisotropy and temperature dependence of the short-range magnetic correlations (ν=0.58±0.05, ${\kappa }_{?}$/${\kappa }_{\perp }$=1.8±0.2) above $T_N$. Comparisons are made to other Ce and U compounds and to recent theoretical calculations of Kioussis and Cooper.