Domain wall dynamics in ultra thin manganite film

Intrinsic domain-wall resistivity in half-metallic manganite thin films

Domain wall resistivity in epitaxial thin film

This article reviews our recent experimental studies of domain wall (DW) resistivity in epitaxial transition metal ferromagnetic thin film microstructures with stripe domains. The results are presented and analysed in the context of models of DW scattering and conventional magnetoresistance (MR) effects in ferromagnetic metals. Microstructures of progressively higher magnetic anisotropy and thu...

Oxygen-driven anisotropic transport in ultra-thin manganite films

Transition metal oxides have a range of unique properties due to coupling of charge, spin, orbital and lattice degrees of freedom and nearly degenerate multiple ground states. These properties make them interesting for applications and for fundamental investigations. Here we report a new phase with abnormal transport anisotropy in La(0.7)Sr(0.3)MnO3 ultra-thin films under large tensile strain. ...

Dynamics of Domain Wall in Thin Film Driven by Spin Current

The dynamics of magnetization under the applied spin current is modeled by the generalized Landau-Lifshitz-Gilbert equation with a spin transfer torque term. Using matched asymptotic expansion with the domain wall thickness ǫ as the small parameter, we derive analytically the dynamic law for the domain wall motion induced by the spin current. We show that the domain wall driven by adiabatic cur...

Thickness dependent magnetotransport in ultra-thin manganite films

To understand the near-interface magnetism in manganites, uniform, ultrathin films of La0.67Sr0.33MnO3 were grown epitaxially on single crystal (001) LaAlO3 and (110) NdGaO3 substrates. The temperature and magnetic field dependent film resistance is used to probe the film’s structural and magnetic properties. A surface and/or interface related dead-layer is inferred from the thickness dependent...