  Epitaxial Fe(Te,Se) thin films have been grown on various substrates but
never been realized on magnetic layers. Here we report the epitaxial growth of
four-fold Fe(Te,Se) film on a six-fold antiferromagnetic insulator, MnTe. The
Fe(Te,Se)/MnTe heterostructure shows a clear superconducting transition at
around 11 K and the critical magnetic field measurement suggests the origin of
the superconductivity to be bulk-like. Structural characterizations suggest
that the uniaxial lattice match between Fe(Te,Se) and MnTe allows a hybrid
symmetry epitaxy mode, which was recently discovered between Fe(Te,Se) and
Bi2Te3. Furthermore, Te/Fe flux ratio during deposition of the Fe(Te,Se) layer
is found to be critical for its superconductivity. Now that superconducting
Fe(Te,Se) can be grown on two related hexagonal platforms, Bi2Te3 and MnTe,
this result opens a new possibility of combining topological superconductivity
of Fe(Te,Se) with the rich physics in the intrinsic magnetic topological
materials (MnTe)n(Bi2Te3)m family.
