Highly nonlinear magnetoelectric effect in buckled-honeycomb antiferromagnetic Co4Ta2O9

Nara Lee, Dong Gun Oh, Sungkyun Choi, Jae Young Moon, Jong Hyuk Kim, Hyun Jun Shin, Kwanghyo Son, Jürgen Nuss, Valery Kiryukhin, Young Jai Choi

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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, A4B2O9 (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.

Original languageEnglish
Article number12362
JournalScientific reports
Volume10
Issue number1
DOIs
Publication statusPublished - 2020 Dec 1

All Science Journal Classification (ASJC) codes

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    Lee, N., Oh, D. G., Choi, S., Moon, J. Y., Kim, J. H., Shin, H. J., Son, K., Nuss, J., Kiryukhin, V., & Choi, Y. J. (2020). Highly nonlinear magnetoelectric effect in buckled-honeycomb antiferromagnetic Co4Ta2O9. Scientific reports, 10(1), [12362]. https://doi.org/10.1038/s41598-020-69117-5