Superexchange-Driven Magnetoelectricity in Magnetic Vortices

Kris T. Delaney, Maxim Mostovoy, and Nicola A. Spaldin
Phys. Rev. Lett. 102, 157203 – Published 17 April 2009

Abstract

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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  • Received 17 October 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.157203

©2009 American Physical Society

Authors & Affiliations

Kris T. Delaney1, Maxim Mostovoy2, and Nicola A. Spaldin1

  • 1Materials Department, University of California, Santa Barbara, California 93106-5050, USA
  • 2Zernike Institute for Advanced Materials, University of Groningen, Nijenborg 4, The Netherlands

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Issue

Vol. 102, Iss. 15 — 17 April 2009

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