Direct observation of cycloidal spin modulation and field-induced transition in N\'eel-type skyrmion-hosting VOSe$_2$O$_5$

T. Kurumaji; T. Nakajima; A. Feoktystov; E. Babcock; Z. Salhi; V. Ukleev; T. Arima; K. Kakurai; Y. Tokura

doi:10.7566/JPSJ.90.024705

Direct observation of cycloidal spin modulation and field-induced transition in N\'eel-type skyrmion-hosting VOSe$_2$O$_5$

Strongly Correlated Electrons 2021-01-19 v2

Authors: T. Kurumaji , T. Nakajima , A. Feoktystov , E. Babcock , Z. Salhi , V. Ukleev , T. Arima , K. Kakurai , Y. Tokura

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Abstract

We investigate the spin rotational structure of magnetic skyrmions in a tetragonal polar magnet VOSe2O5 via polarized small-angle neutron scattering (SANS). Spin polarization analysis of the scattered neutrons provides consistent evidence for the cycloidal spin modulation in all the incommensurate phases at zero and non-zero magnetic field along the c axis, including the triangular skyrmion-lattice phase. In the vicinity of the skyrmion phase, we performed extensive SANS measurements to unravel a field-induced incommensurate phase (IC-2 state). We discuss the possibility of anisotropic double-q state as an alternative spin structure to provisional square skyrmion-lattice state.

Keywords

skyrmion cycloidal spin modulation polarized sans voSe2o5 field-induced transition incommensurate phase double-q state

Cite

@article{arxiv.1912.06309,
  title  = {Direct observation of cycloidal spin modulation and field-induced transition in N\'eel-type skyrmion-hosting VOSe$_2$O$_5$},
  author = {T. Kurumaji and T. Nakajima and A. Feoktystov and E. Babcock and Z. Salhi and V. Ukleev and T. Arima and K. Kakurai and Y. Tokura},
  journal= {arXiv preprint arXiv:1912.06309},
  year   = {2021}
}

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27 pages, 5 figures

Direct observation of cycloidal spin modulation and field-induced transition in N\'eel-type skyrmion-hosting VOSe$_2$O$_5$

Abstract

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