In recent years it has become clear that complex oxides provide an exceptional platform for
the discovery of new physics as well as a considerable challenge to our understanding of
correlated electrons. The tendency of these materials to display nanoscale electronic and
magnetic inhomogeneity is a good example. Here, we have applied a variety of
experimental techniques to investigate this magneto-electronic phase separation in a model
system—the doped cobaltite La 1− x Sr x CoO 3. Comparing experimental data over a wide …

The doped perovskite cobaltites, in particular La 1-x Sr x CoO 3 (LSCO), have emerged as
productive systems for the study of the magneto-electronic phase separation phenomenon
widely observed in complex oxide materials. It is now well established that this system
phase separates into hole-rich ferromagnetic clusters embedded in a hole-poor non-
ferromagnetic insulating matrix at low doping. These clusters percolate at a critical doping
value near x= 0.17 leading to a crossover from short-to long-range ferromagnetic order and …