Abstract
Taking into account size effect of the ferroelectric tunnel barrier and interface effect determined by two dissimilar magnetic electrodes, the ferroelectric stability and magnetoelectric effect of asymmetric multiferroic tunnel junctions have been comprehensively calculated. Results of the stable structure, polarization, electrostatic potential, charge density, spin density, and magnetic moments demonstrated a series of the great hidden features in asymmetric multiferroic tunnel junctions and showed significant differences between two polarization states. The potential and magnetic moment are strongly affected by electric and magnetic polarizations, suggesting the possibility of ferroelectric control of magnetization and coexistence of tunnel magnetoresistance and giant electroresistance effects.
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