Observation of domain wall resistivity in $\mathrm{SrRu}{\mathrm{O}}_3$

Abstract

$\mathrm{SrRu}{\mathrm{O}}_3$ is an itinerant ferromagnet with $T_c\sim 150\mathrm{K}$. When $\mathrm{SrRu}{\mathrm{O}}_3$ is cooled through $T_c$ in zero applied magnetic field, a stripe domain structure appears whose orientation is uniquely determined by the large uniaxial magnetocrystalline anisotropy. We find that the ferromagnetic domain walls clearly enhance the resisitivity of $\mathrm{SrRu}{\mathrm{O}}_3$ and that the enhancement has different temperature dependence for currents parallel and perpendicular to the domain walls. We discuss possible interpretations of our results.

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