Magnetoelectric effects in the skyrmion host material Cu2OSeO3

E. Ruff; P. Lunkenheimer; A. Loidl; H. Berger; S. Krohns

doi:10.1038/srep15025

Magnetoelectric effects in the skyrmion host material Cu2OSeO3

Strongly Correlated Electrons 2015-11-05 v1 Materials Science

Authors: E. Ruff , P. Lunkenheimer , A. Loidl , H. Berger , S. Krohns

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Abstract

Insulating helimagnetic Cu2OSeO3 shows sizeable magnetoelectric effects in its skyrmion phase. Using magnetization measurements, magneto-current analysis and dielectric spectroscopy, we provide a thorough investigation of magnetoelectric coupling, polarization and dielectric constants of the ordered magnetic and polar phases of single-crystalline Cu2OSeO3 in external magnetic fields up to 150 mT and at temperatures below 60 K. From these measurements we construct a detailed phase diagram. Especially, the skyrmion phase and the metamagnetic transition of helical to conical spin order are characterized in detail. Finally we address the question if there is any signature of polar order that can be switched by an external electric field, which would imply multiferroic behaviour of Cu2OSeO3.

Keywords

magnetoelectric effects skyrmion phase Cu2OSeO3 helimagnetic dielectric spectroscopy multiferroic phase diagram

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@article{arxiv.1504.03918,
  title  = {Magnetoelectric effects in the skyrmion host material Cu2OSeO3},
  author = {E. Ruff and P. Lunkenheimer and A. Loidl and H. Berger and S. Krohns},
  journal= {arXiv preprint arXiv:1504.03918},
  year   = {2015}
}

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9 pages, 5 figures

Magnetoelectric effects in the skyrmion host material Cu2OSeO3

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