All-Electrical Operation of a Curie Switch at Room Temperature

We present all-electrical operation of a ${\mathrm{Fe}}_{x}{\mathrm{Cr}}_{1\ensuremath{-}x}$-based Curie switch at room temperature. More specifically, we study the current-induced thermally driven transition from ferromagnetic to antiferromagnetic Ruderman-Kittel-Kasuya-Yosida (RKKY) indirect coupling in ${\mathrm{Fe}/\mathrm{Cr}/\mathrm{Fe}}_{17.5}{\mathrm{Cr}}_{82.5}/\mathrm{Cr}/\mathrm{Fe}$ multilayer. Magnetometry measurements different temperatures show that zero field is observed approximately $325$ K. Analytical modeling confirms temperature-dependent interlayer exchange originates modification effective constant through ferromagnetic-to-paramagnetic ${\mathrm{Fe}}_{17.5}{\mathrm{Cr}}_{82.5}$ spacer with minor contributions variations magnetization and magnetic anisotropy Fe layers. Room-temperature current-in-plane magnetotransport on patterned strips ``low-resistance'' parallel ``high-resistance'' antiparallel remanent configuration, upon increased probing current density. Quantitative comparison switching fields, obtained by magnetometry magnetotransport, Joule heating main mechanism responsible for resistive switching.