Abstract
Based on first-principles calculations, the magnetoelectric effect and the critical thickness for ferroelectricity in Co/BaTiO3/Co multiferroic tunnel junctions were investigated. The calculated results show that the ferroelectricity of multiferroic tunnel junctions can be maintained until a critical thickness of 1.6 nm. The magnetic moments of interface atoms are sensitive to the ferroelectric displacements, which leads to a sizable magnetoeletric effect in multiferroic tunnel junctions. The multiferroic tunnel junctions may opens an avenue for the development of novel electronic devices.
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