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