We identified magnetoelectric effect in an ultrathin (Cr 2O 3/Fe 2O 3) nano-oxide layer structure (thickness ∼1 nm) formed on the surface of a Co 0.9Fe 0.1 metal layer by investigating the training effect as a function of sense current/bias voltage and its direction. A system-dependent constant κ MR, which reflects changes in the surface spin, increases (decreases) with increasing current in the pinned (inverse pinned) direction. Furthermore, κ MR varies for temperatures up to ∼200 K with current despite the extreme thinness, thus suggesting the current contributes to the surface spin changes. The results indicate the demonstration of the magnetoelectric effect in ultrathin Cr 2O 3.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)