We report the electronic and magnetic properties of stoichiometric CeAuBi$_{ 2}$ single crystals. At ambient pressure, CeAuBi$_{ 2}$ orders antiferromagnetically below a N\'{ e}el temperature ($T_{ N}$) of 19 K. Neutron diffraction experiments revealed an antiferromagnetic propagation vector $\hat{ \tau} = [0, 0, 1/2]$, which doubles the paramagnetic unit cell along the $c$-axis. At low temperatures several metamagnetic transitions are induced by the application of fields parallel to the $c$-axis, suggesting that the magnetic structure of CeAuBi$_{ 2}$ changes as a function of field. At low temperatures, a linear positive magnetoresistance may indicate the presence of band crossings near the Fermi level. Finally, the application of external pressure favors the antiferromagnetic state, indicating that the 4$f$ electrons become more localized.
Categories: cond-mat.str-el