Magnetism in the N\'{e}el skyrmion host GaV$_4$S$_8$ under pressure

T. J. Hicken; M. N. Wilson; S. J. R. Holt; R. Khassanov; M. R. Lees; R. Gupta; D. Das; G. Balakrishnan; T. Lancaster

Magnetism in the N\'{e}el skyrmion host GaV$_4$S$_8$ under pressure

Strongly Correlated Electrons 2022-03-23 v2

Authors: T. J. Hicken , M. N. Wilson , S. J. R. Holt , R. Khassanov , M. R. Lees , R. Gupta , D. Das , G. Balakrishnan , T. Lancaster

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Abstract

We present magnetization and muon-spin spectroscopy measurements of N\'{e}el skyrmion-host GaV $_4$ S $_8$ under the application of hydrostatic pressures up to $P=2.29$ GPa. Our results suggest that the magnetic phase diagram is altered with pressure via a reduction in the crossover temperature from the cycloidal (C) to ferromagnetic-like state with increasing $P$ , such that, by 2.29 GPa, the C state appears to persist down to the lowest measured temperatures. With the aid of micromagnetic simulations, we propose that the driving mechanism behind this change is a reduction in the magnetic anisotropy of the system, and suggest that this could lead to an increase in stability of the skyrmion lattice.

Keywords

neel skyrmion gav4s8 hydrostatic pressure magnetization muon-spin spectroscopy micromagnetic simulation magnetic anisotropy

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@article{arxiv.2201.12794,
  title  = {Magnetism in the N\'{e}el skyrmion host GaV$_4$S$_8$ under pressure},
  author = {T. J. Hicken and M. N. Wilson and S. J. R. Holt and R. Khassanov and M. R. Lees and R. Gupta and D. Das and G. Balakrishnan and T. Lancaster},
  journal= {arXiv preprint arXiv:2201.12794},
  year   = {2022}
}

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9 pages, 6 figures

Magnetism in the N\'{e}el skyrmion host GaV$_4$S$_8$ under pressure

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