Highly nonlinear magnetoelectric effect in buckled-honeycomb antiferromagnetic Co4Ta2O9
- Authors
- Nara Lee; DONGGUN OH; Sungkyun Choi; Jae Young Moon; JONGHYUKKIM; HYUNJUN SHIN; Kwanghyo Son; J?rgen Nuss; Valery Kiryukhin; Young Jai Choi
- Issue Date
- Jul-2020
- Publisher
- NATURE PORTFOLIO
- Keywords
- Magnetoelectric effect; Honeycomb lattice; Antiferromagnets
- Citation
- SCIENTIFIC REPORTS, v.10, no.1
- Journal Title
- SCIENTIFIC REPORTS
- Volume
- 10
- Number
- 1
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6467
- DOI
- 10.1038/s41598-020-69117-5
- ISSN
- 2045-2322
- Abstract
- Strongly correlated materials with multiple order parameters provide unique insights into the fundamental interactions in condensed matter systems and present opportunities for innovative technological applications. A class of antiferromagnetic honeycomb lattices compounds, A(4)B(2)O(9) (A=Co, Fe, Mn; B=Nb, Ta), have been explored owing to the occurrence of linear magnetoelectricity. From our investigation of magnetoelectricity on single crystalline Co4Ta2O9, we discovered strongly nonlinear and antisymmetric magnetoelectric behavior above the spin-flop transition for magnetic fields applied along two orthogonal in-plane directions. This observation suggests that two types of inequivalent Co2+ sublattices generate magnetic-field-dependent ferroelectric polarization with opposite signs. The results motivate fundamental and applied research on the intriguing magnetoelectric characteristics of these buckled-honeycomb lattice materials.
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Collections - College of Science > Physics > 1. Journal Articles
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