We report proximity effects of spin-orbit coupling in ${\mathrm{EuO}}_{1-\mathrm{x}}$ films capped with a Pt overlayer. Transport measurements suggest that current flows along a conducting channel at the interface between the Pt and EuO. The temperature dependence of the resistivity picks up the critical behaviors of EuO, i.e., the metal-to-insulator transition. We also find an unusual enhancement of the magnetic anisotropy in this structure from its bulk value, which results from strong spin-orbit coupling across the $\mathrm{Pt}/{\mathrm{EuO}}_{1-\mathrm{x}}$ interface.

• Received 11 April 2018
• Revised 24 August 2018

DOI:https://doi.org/10.1103/PhysRevB.98.144442