  Photoactive materials hold great promise for a variety of applications. We
present a finite element model of light-controlled flexible magnetic composite
structure composed of 33.3% Chromium dioxide (CrO2) and 66.7%
Polydimethylsiloxane (PDMS) by weight. The structure has a dimension of 8 mm x
2 mm x 100 um and has been previously experimentally studied. Due to the low
Curie temperature, the structure acts as an actuator, shows significant
deflection under the external magnetic field and relaxation due to laser
heating. Thermal and magnetic deflection analysis has been performed using the
FEM model. The simulation results show a maximum structural deflection of 6.08
mm (76% of the length of the structure) when subjected to 30 mT magnetic flux
density and 160 mW laser power at 303 K (room temperature). We will present the
results of the simulation model and comparison to experimental data reproducing
the previously observed motion of the (CrO2+PDMS). This model will enable
future fracture and fatigue analysis as well as extension to new photoactive
geometries.
