The crystal and magnetic structures of the oxygen deficient manganites La<Subscript>0.7</Subscript>Sr<Subscript>0.3</Subscript>MnO<Subscript>3-d< /Subscript> (d=0.15, 0.20) have been studied by means of powder neutron diffraction over the 0–5.2 GPa pressure and 10–290 K temperature ranges. La<Subscript>0.7</Subscript>Sr<Subscript>0.3</Subscript>MnO<Subscript>2.85 </Subscript> exhibits a coexistence of rhombohedral <InlineEquation ID="Equ1"> <EquationSource Format="TEX">$(R\bar...</equationsource></inlineequation></subscript></subscript></subscript></subscript></subscript></subscript>

The Larsen perturbation method is adopted to study the influence of magnetic fields on polarons in realistic heterojunctions in a quasi-two-dimension approximation. The interaction between an electron and both the bulk longitudinal optical phonons and the two branches of interface optical...