  While the family of layered pnictides $ABX_2$ ($A$ : rare or alkaline earth
metals, $B$ : transition metals, $X$ : Sb/Bi) can host Dirac dispersions based
on Sb/Bi square nets, nearly half of them has not been synthesized yet for
possible combinations of the $A$ and $B$ cations. Here we report the
fabrication of EuCdSb$_{\mathrm{2}}$ with the largest $B$-site ionic radius,
which is stabilized for the first time in thin film form by molecular beam
deposition. EuCdSb$_{\mathrm{2}}$ crystallizes in an orthorhombic $Pnma$
structure and exhibits antiferromagnetic ordering of the Eu magnetic moments at
$T_\mathrm{N}=15$K. Our successful growth will be an important step for further
exploring novel Dirac materials using film techniques.
