Switching Behavior Induced by Electric and Magnetic Fields in （La0.73Bi0.27）0.67Ca0.33MnO3

Both electric and magnetic field-induced switching behaviors between a high resistive state and a low resistive one are observed in （La0.73Bi0.27）0.67Ca0.33MnO3. The effects of magnetoresistance a.nd electric-resistance suggest that the applied electric field and magnetic field greatly tune the percolative paths in the phase-separated system. According to the experimental results, the switching behaviors may come from the coexistence of the charge ordering state, and localized and freedom ferromagnetic states, in which the external field destroys partially the localized ferromagnetic states and charge ordering leads to the ferromagnetic state growth, which causes a switch between a high resistive state and low resistive one. This makes the doped manganite a good system for both electric and magnetic field sensor materials.