Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3

T. Adams; A. Chacon; M. Wagner; A. Bauer; G. Brandl; B. Pedersen; H. Berger; P. Lemmens; C. Pfleiderer

doi:10.1103/PhysRevLett.108.237204

Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3

Strongly Correlated Electrons 2012-06-13 v1 Materials Science Other Condensed Matter

Authors: T. Adams , A. Chacon , M. Wagner , A. Bauer , G. Brandl , B. Pedersen , H. Berger , P. Lemmens , C. Pfleiderer

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Abstract

We report a long-wavelength helimagnetic superstructure in bulk samples of the ferrimagnetic insulator Cu2OSeO3. The magnetic phase diagram associated with the helimagnetic modulation inferred from small angle neutron scattering and magnetisation measurements includes a skyrmion lattice phase and is strongly reminiscent of MnSi, FeGe and Fe1-xCoxSi, i.e., binary isostructural siblings of Cu2OSeO3 that order helimagnetically. The temperature dependence of the specific heat of Cu2OSeO3 is characteristic of nearly critical spin fluctuations at the helimagnetic transition. This provides putative evidence for effective spin currents as the origin of enhancements of the magneto-dielectric response instead of atomic displacements considered so far.

Keywords

helimagnetic order skyrmion lattice Cu2OSeO3 small angle neutron scattering magnetodielectric response spin fluctuations

Cite

@article{arxiv.1204.3597,
  title  = {Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3},
  author = {T. Adams and A. Chacon and M. Wagner and A. Bauer and G. Brandl and B. Pedersen and H. Berger and P. Lemmens and C. Pfleiderer},
  journal= {arXiv preprint arXiv:1204.3597},
  year   = {2012}
}

Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3

Abstract

Keywords

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