  Scanning tunnelling spectroscopy measurements were performed on
La0.7Sr0.3MnO3 thin films both at room temperature and liquid nitrogen
temperature. While no inhomogeneities were recorded at liquid nitrogen
temperature on any sample, a clear evidence of spectroscopic inhomogeneities
was evident in tunnelling conductance maps collected at room temperature. The
investigated films exhibit a transition from a ferromagnetic-metallic to a
paramagnetic-insulating state around room temperature, so that the observed
spectroscopic features can be interpreted within a phase separation scenario. A
quantitative analysis of the observed spectroscopic features is reported
pointing out the occurrence of phase modulation and its possible correlation
with the properties of the system.
