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Updated: Dec 9, 2025

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Thickness and Ferroelectric Polarization Influence on Film Magnetic Anisotropy across a Multiferroic Material
Andy Paul Chen1,2, Weinan Lin3, Jingsheng Chen3,2
1Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States.
Abstract:
The ferroelectric switching effect on perpendicular magnetic anisotropy is examined for the case of the BaTiO3/L10-CoFe interface through first-principles calculations of film magnetocrystalline anisotropy energy (MAE), both with the frozen-potential method and the second-order perturbation theory. The ferroelectric switching-MAE relationship is shown to have opposite trends for BaO- and TiO2-terminated interfaces because of the distinct orbital interaction mechanisms predominant in each termination configuration. The ferroelectric switching effect, changes in Fe-O bond lengths, and termination constitute three different contributors to MAE change, each with a different penetration depth into the CoFe film. The top surface CoFe atoms are shown to feature a high density of minority-spin 3d states, which could play a role in influencing the ferroelectric switching-MAE relationship in cases where the top surface undergoes modifications.
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