  PrRhC2 belongs to the rare-earth carbides family whose properties are of
special interest among topological semimetals due to the simultaneous breaking
of both inversion and time-reversal symmetry. The concomitant absence of both
symmetries grants the possibility to tune the Weyl nodes chirality and to
enhance topological effects like the chiral anomaly. In this work, we report on
the synthesis and compare the magnetotransport measurements of a poly- and
single crystalline PrRhC2 sample. Using a remarkable and sophisticated
technique, the PrRhC2 single crystal is prepared via focused ion beam cutting
from the polycrystalline material. Our magnetometric and specific heat analyses
reveal a non-collinear antiferromagnetic state below 20K, as well as
short-range magnetic correlations and/or magnetic fluctuations well above the
onset of the magnetic transition. The transport measurements on the PrRhC2
single crystal display an electrical resistivity peak at 3K and an anomalous
Hall effect below 6K indicative of a net magnetization component in the ordered
state. Furthermore, we study the angular variation of magnetoresistivities as a
function of the angle between the in-plane magnetic field and the injected
electrical current. We find that both the transverse and the longitudinal
resistivities exhibit fourfold angular dependencies due to higher-order terms
in the resistivity tensor, consistent with the orthorhombic crystal symmetry of
PrRhC2. Our experimental results may be interpreted as features of topological
Weyl semimetallic behavior in the magnetotransport properties.
