Effect of interfacial Cr on magnetoelectricity of Fe2/CrO2/BaTiO3(001)
Abstract
On the basis of first-principles calculations we study the effect of interfacial Cr on the magnetoelectric properties of a composite multiferroic FeL/BaTiO3(001), with the Fe thickness L=1,2 monolayers. The use of the CrO2-terminated interface instead of TiO2 may significantly enhance magnetoelectricity in the system, showing an unexpected change in magnetization induced by the electric polarization reversal. In the case of L=2, for instance, the magnetic order of the Fe bilayer can be switched from nearly zero ferrimagnetic to ferromagnetic upon polarization reversal.
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