Magnetotransport of SrRuO3 thin film on SrTiO3(001)

Magnetotransport properties of an 80 nm-thick high quality epitaxial film of SrRuO3 grown on SrTiO3(001) were investigated. The film has tetragonal structural symmetry (c-axis perpendicular to film plane), and shows a uniaxial strong magnetic anisotropy with the easy axis along the c-axis. Magnetotransport phenomena are also uniaxially anisotropic. Magnetoresistivity, Delta rho(xx)(H): in longitudinal geometry is negative and becomes larger at T-C. The Hall resistivity: rho(xy)(H), is not proportional to magnetic field because it contains the extraordinary Hall resistivity component, which is composed of negative skew scattering and positive side-jump scattering, both of which are due to spin-orbital interaction. The field-dependence of rho(xy)(H) indicates that the origin of Delta rho(xx)(H) of SrRuO3 is the spin-dependent scattering. The ordinary Hall coefficient depends on temperature in such a way that, among multi carriers electron type carriers become dominant below T-C.