  Epitaxial 200nm BiFe$_{0.95}$Mn$_{0.05}$O$_{3}$ (BFO) film was grown by
pulsed laser deposition on (111) oriented SrTiO3 substrate buffered with a 50nm
thick SrRuO$_{3}$ electrode. The BFO thin film shows a rhombohedral structure
and a large remnant polarization of Pr = 104 $\mu$C/cm$^{2}$. By comparing I(V)
characteristics with different conduction models we reveal the presence of both
bulk limited Poole-Frenkel and Schottky interface mechanisms and each one
dominates in a specific range of temperature. At room temperature and under
10mW laser illumination, the as grown BFO film presents short-circuit current
density (Jsc) and open circuit voltage (Voc) of 2.25mA/cm$^{2}$ and -0.55V
respectively. This PV effect can be switched by applying positive voltage
pulses higher than the coercive field. For low temperatures a large Voc value
of about -4.5V (-225kV/cm) is observed which suggests a bulk
non-centrosymmetric origin of the PV response.
