  Self-interaction corrected local spin density approximation calculations were
performed for La$_{(1-x)}$Sr$_x$MnO$_3$ (LSMO) ($0.0<x<0.5$). The influence and
inter-relationship of Sr doping, magnetic structure, O displacements and phase
segregation on the Mn charge state were studied. A half-metallic state was
obtained for LSMO with manganese configuration Mn$^{3+}$, whilst Mn$^{4+}$ gave
rise to a metallic state with a negligible spin polarisation at the Fermi
level. Elongating the MnO$_6$ octahedron led to a static mixed valence
Mn$^{3+}$/Mn$^{4+}$ configuration. In the mixed valence state the total energy
was minimized by an ordered array of Mn$^{4+}$ and Mn$^{3+}$ MnO$_2$ planes
which showed charge ordered stripes.
