In La0.8-x, BixSr0.2MnO3 films(x = 0 similar to 0.3) prepared by a las
er deposition technique, Magneto-Circular Dichroism (MCD) spectra betw
een 1.5 to 6 eV and temperature dependence of resistivity were investi
gated. In the films without Bi, three optical transitions between 3 an
d 5 eV in MCD spectra are confirmed by the fitting. The Bi-doping make
s shift these three transitions to higher energy and induces a new tra
nsition which shifts to lower energy by increasing of doping content.
These transitions are ascribed to the charge transfer transitions from
O2p to Mndy (e(g)).