Angular dependence of domain wall resistivity in SrRuO$_{\bf 3}$ films

Abstract

${\rm SrRuO_3}$ is a 4d itinerant ferromagnet (T$_{c}$ $\sim $150 K) with stripe domain structure. Using high-quality thin films of SrRuO$_{3}$ we study the resistivity induced by its very narrow ($\sim 3$ nm) Bloch domain walls, $ρ_{DW}$ (DWR), at temperatures between 2 K and T$_{c}$ as a function of the angle, $θ$, between the electric current and the ferromagnetic domains walls. We find that $ρ_{DW}(T,θ)=\sin^2θρ_{DW}(T,90)+B(θ)ρ_{DW}(T,0)$ which provides the first experimental indication that the angular dependence of spin accumulation contribution to DWR is $\sin^2θ$. We expect magnetic multilayers to exhibit a similar behavior.