  We measure the ratio of cross sections, {\sigma}(ppbar -> Z + b
jet)/{\sigma}(ppbar -> Z + jet), for associated production of a Z boson with at
least one jet. The ratio is also measured as a function of the jet transverse
momentum, jet pseudorapidity, Z boson transverse momentum, and the azimuthal
angle between the Z boson and the closest jet for events with at least one b
jet. These measurements use data collected by the D0 experiment in Run II of
Fermilab's Tevatron ppbar Collider at a center-of-mass energy of 1.96 TeV, and
correspond to an integrated luminosity of 9.7 fb$^{-1}$. The results are
compared to predictions from next-to-leading order calculations and various
Monte Carlo event generators.
