We report the electronic and magnetic properties of stoichiometric ${\mathrm{CeAuBi}}_2$ single crystals. At ambient pressure, ${\mathrm{CeAuBi}}_2$ orders antiferromagnetically below a Néel temperature ($T_N$) of 19 K. Neutron diffraction experiments revealed an antiferromagnetic propagation vector $\widehat{\tau }=[0,0,1/2]$, 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 ${\mathrm{CeAuBi}}_2$ 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 $4f$ electrons become more localized.

• Received 23 April 2020
• Revised 1 June 2020
• Accepted 2 June 2020

DOI:https://doi.org/10.1103/PhysRevB.101.214431

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Published by the American Physical Society