  We report the experimental and theoretical studies of a magnetic topological
nodal line semimetal candidate HoSbTe. Single crystals of HoSbTe are grown from
Sb flux, crystallizing in a tetragonal layered structure (space group: P4/nmm,
no.129), in which the Ho-Te bilayer is separated by the square-net Sb layer.
The magnetization and specific heat present distinct anomalies at 4 K related
to an antiferromagnetic (AFM) phase transition. Meanwhile, with applying
magnetic field perpendicular and parallel to the crystallographic c axis, an
obvious magnetic anisotropy is observed. Electrical resistivity undergoes a
bad-metal-like state below 200 K and reveals a plateau at about 8 K followed by
a drop due to the AFM transition. In addition, with the first-principle
calculations of band structure, we find that HoSbTe is a topological nodal line
semimetal or a weak topological insulator with or without taking the spin-orbit
coupling into account, providing a platform to investigate the interplay
between magnetic and topological fermionic properties.
