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


Abstract in English

${rm SrRuO_3}$ 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, $rho_{DW}$ (DWR), at temperatures between 2 K and T$_{c}$ as a function of the angle, $theta $, between the electric current and the ferromagnetic domains walls. We find that $rho_{DW}(T,theta)=sin^2theta rho_{DW}(T,90)+B(theta)rho_{DW}(T,0)$ which provides the first experimental indication that the angular dependence of spin accumulation contribution to DWR is $sin^2theta$. We expect magnetic multilayers to exhibit a similar behavior.

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