Study of the structure factor anisotropy and long range correlations of ferrofluids in the dilute low-coupling regime

► Formalism for dipolar hard-sphere fluids extended to dipolar soft-sphere fluids. ►New virial coefficients derived for the zero and non-zero magnetic field cases. ► Simulations show the formalism to be valid in the diluted low-coupling regime (DLCR). ► For moderate and strong magnetic fields, further coefficients need to be derived.► Simulations with applied field show significant particle correlations in the DLCR.