  We explain the observed specific heat anomaly (and hence entropy change) in
the colossal magnetoresistive manganite Sm0.55Sr0.45MnO3, by introducing phase
separation into the current carrier density collapse theory via the notion of
the ferromagnetic volume fraction. Within the same framework, we have also been
able to explain the observed electrical resistivity of Sm0.55Sr0.45MnO3 by
using appropriate expressions governing the scattering mechanisms far away from
the transition. Fitting specific heat and resistivity results has allowed us to
separate the hopping activation energy of polaronic carriers and the bipolaron
binding energy contributions to the exponential behaviour of resistivity in the
paramagnetic phase.
