  Superlattices consist of two ferromagnets La0.7Sr0.3MnO3(LSMO)and SrRuO3(SRO)
were grown in (110)-orientation on SrTiO3(STO) substrates. The x-ray
diffraction and Raman spectra of these superlattices show the presence of
in-plane compressive strain and orthorhombic structure of less than 4 u.c.
thick LSMO spacer,respectively. Magnetic measurements reveal several features
including reduced magnetization, enhanced coercivity, antiferromagnetic
coupling, and switching from antiferromagnetic to ferromagnetic coupling with
magnetic field orientations. These magnetic properties are explained by the
observed orthorhombic structure of spacer LSMO in Raman scattering which occurs
due to the modification in the stereochemistry of Mn at the interfaces of SRO
and LSMO.
