  The spin dynamics of Tb(OETAP)$_2$ single ion magnets was investigated by
means of muon spin resonance ($\mu$SR) both in the bulk material as well as
when the system is embedded into PEDOT:PSS polymer conductor. The
characteristic spin fluctuation time is characterized by a high temperature
activated trend, with an energy barrier around 320 K, and by a low temperature
tunneling regime. When the single ion magnet is embedded into the polymer the
energy barrier only slightly decreases and the fluctuation time remains of the
same order of magnitude even at low temperature. This finding shows that these
single molecule magnets preserve their characteristics which, if combined with
those of the conducting polymer, result in a hybrid material of potential
interest for organic spintronics.
