Magnetic-Domain-Wall-Induced Electrical Polarization in Rare-Earth Iron Garnet Systems: A First-Principles Study

Temuujin Bayaraa, Changsong Xu, Yali Yang, Hongjun Xiang, and L. Bellaiche
Phys. Rev. Lett. 125, 067602 – Published 7 August 2020
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Abstract

First-principles methods are employed to understand the existence of magnetic-domain-wall-induced electric polarization observed in rare-earth iron garnets. In contrast with previous beliefs, it is found that the occurrence of such polarization neither requires the local magnetic moments of the rare-earth ions nor noncollinear magnetism. It can rather be understood as originating from a magnetoelectric effect arising from ferromagnetic interactions between octahedral and tetrahedral Fe ions at the domain walls, and the mechanism behind is found to be a symmetric exchange-striction mechanism.

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  • Received 5 March 2020
  • Accepted 14 July 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.067602

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Temuujin Bayaraa1, Changsong Xu1,2,*, Yali Yang3, Hongjun Xiang3,4,5, and L. Bellaiche1,2

  • 1Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA
  • 2Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
  • 3Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai 200433, China
  • 4Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
  • 5Shanghai Qi Zhi Institute, Shanghai 200232, China

  • *cx002@uark.edu

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Issue

Vol. 125, Iss. 6 — 7 August 2020

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