Images of metallic and insulating domains on the surface of a   (La0.4Pr0.6)0.67Ca0.33MnO3 film
  Using conductive atomic force microscopy, we observed non-uniform distributions of metallic and insulating domains on the surface of a single crystalline (La0.4Pr0.6)0.67Ca0.33MnO3 film grown on a (110) NdGaO3 substrate. The electronic properties of the surface exhibit thermal hysteresis. The hysteresis is similar to that of the transport and magnetism of the film bulk. 
Surendra Singh, M. R. Fitzsimmons, H. Jeen, A. Biswas and M.E. Hawley
cond-mat.mtrl-sci cond-mat.str-el