  We report the first experimental realization of orbital two-channel Kondo
(2CK) effect from two-level systems (TLSs) in epitaxial L10-MnAl films with
giant perpendicular magnetic anisotropy. The resistivity exhibits a
low-temperature (T) upturn with a clear transition from a lnT-dependence to
T1/2-dependence and deviation from it in three distinct T regimes, which are
independent of applied magnetic fields. The magnitudes of Kondo temperature and
energy splitting of the TLSs are greatly enhanced in comparison to those in
other systems exhibiting orbital 2CK, suggesting strong coupling between the
tunneling centers with conduction electrons via resonant scattering. These
results point to a considerable robustness of the orbital 2CK effect even in
the presence of ferromagnetic ordering and significant spin polarization of the
conduction electrons.
