Tianyi Cai, Sheng Ju, Jaekwang Lee, Na Sai, Alexander A. Demkov, Qian Niu, Zhenya Li, Junren Shi, Enge Wang
Published 2009-10-06Version 1
Ferromagnet-ferroelectric-metal superlattices are proposed to realize the large room-temperature magnetoelectric effect. Spin dependent electron screening is the fundamental mechanism at the microscopic level. We also predict an electric control of magnetization in this structure. The naturally broken inversion symmetry in our tri-component structure introduces a magnetoelectric coupling energy of $P M^2$. Such a magnetoelectric coupling effect is general in ferromagnet-ferroelectric heterostructures, independent of particular chemical or physical bonding, and will play an important role in the field of multiferroics.
Comments: 5 pages including 3 figures and 1 table
Journal: Phys. Rev. B 80, 140415(R) (2009)
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