  The magneto-transport measurements for Weyl semimetals (WSMs) show that the
planar Hall effect (PHE) can be viewed as the topological response of WSMs. It
is believed that the PHE in WSMs only appears as an extrinsic effect. Indeed,
there is no reported intrinsic PHE (IPHE) in WSMs either theoretically or
experimentally. Herein, guided by symmetry, we predict the IPHE in magnetic
WSMs with the second-order semiclassical theory. We find that the IPHE
conductivity tensor features an antisymmetric form, in sharp contrast with the
extrinsic one predicted in [\textcolor{blue}{Phys. Rev. Lett. 119, 176804
(2017)}]. We reveal that tilting the Weyl cone in the out-of-plane direction is
the key to observing this effect. Moreover, when the tilt direction is fixed,
by tuning the angle formed by $\vec{E}$ and $\vec{B}$ to switch off the
\textit{chiral anomaly}, we find that the IPHE responses driven by Berry
curvature still exist, indicating the fundamental role of Berry curvature as
the origin of IPHE in WSMs than the \textit{chiral anomaly}. Finally, the
experimental strategy to detect the IPHE is discussed.

Mesoscale and Nanoscale Physics