  Klein tunneling refers to the absence of normal backscattering of electrons
even under the case of high potential barriers. At the barrier interface, the
perfect matching of electron and hole wavefunctions enables a unit transmission
probability for normally incident electrons. It is theoretically and
experimentally well understood in two-dimensional relativistic materials such
as graphene. Here we investigate the Klein tunneling effect in Weyl semimetals
under the influence of magnetic field induced by anti-symmetric ferromagnetic
stripes placed at barrier boundaries. Our results show that the resonance of
Fermi wave vector at specific barrier lengths gives rise to perfect
transmission rings, i.e., three-dimensional analogue of the so-called magic
transmission angles in two-dimensional Dirac semimetals. Besides, the
transmission profile can be shifted by application of magnetic field, a
property which may be utilized in electro-optic applications. When the applied
potential is close to the Fermi level, a particular incident vector can be
selected for transmission by tuning the applied magnetic field, thus enabling
highly selective transmission of electrons in the bulk of Weyl semimetals. Our
analytical and numerical calculations obtained by considering Dirac electrons
in three regions and using experimentally feasible parameters can pave the way
for relativistic tunneling applications in Weyl semimetals.
