Superexchange-Driven Magnetoelectricity in Magnetic Vortices

被引:49
作者
Delaney, Kris T. [1 ]
Mostovoy, Maxim [2 ]
Spaldin, Nicola A. [1 ]
机构
[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
[2] Univ Groningen, Zernike Inst Adv Mat, NL-9700 AB Groningen, Netherlands
关键词
FERROELECTRICITY;
D O I
10.1103/PhysRevLett.102.157203
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We demonstrate that magnetic vortices in which spins are coupled to polar lattice distortions via superexchange exhibit an unusually large linear magnetoelectric response. We show that the periodic arrays of vortices formed by frustrated spins on kagome lattices provide a realization of this concept; our ab initio calculations for such a model structure yield a magnetoelectric coefficient that is 30 times larger than that of prototypical single phase magnetoelectrics. Finally, we identify the design rules required to obtain such a response in a practical material.
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页数:4
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