Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal

C. D. Dashwood; L. S. I. Veiga; Q. Faure; J. G. Vale; D. G. Porter; S. P. Collins; P. Manuel; D. D. Khalyavin; F. Orlandi; R. S. Perry; R. D. Johnson; D. F. McMorrow

doi:10.1103/PhysRevB.102.180410

Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal

Strongly Correlated Electrons 2020-11-30 v2

Authors: C. D. Dashwood , L. S. I. Veiga , Q. Faure , J. G. Vale , D. G. Porter , S. P. Collins , P. Manuel , D. D. Khalyavin , F. Orlandi , R. S. Perry , R. D. Johnson , D. F. McMorrow

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Abstract

We show how complex modulated order can spontaneously emerge when magnetic interactions compete in a metal with polar lattice distortions. Combining neutron and resonant x-ray scattering with symmetry analysis, we reveal that the spin reorientation in Ca $_3$ Ru $_2$ O $_7$ is mediated by a magnetic cycloid whose eccentricity evolves smoothly but rapidly with temperature. We find the cycloid to be highly sensitive to magnetic fields, which appear to continuously generate higher harmonic modulations. Our results provide a unified picture of the rich magnetic phases of this correlated, multi-band polar metal.

Keywords

polar metal spin reorientation magnetic cycloid Ca3Ru2O7 neutron scattering resonant x-ray scattering correlated electron system

Cite

@article{arxiv.2006.12882,
  title  = {Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal},
  author = {C. D. Dashwood and L. S. I. Veiga and Q. Faure and J. G. Vale and D. G. Porter and S. P. Collins and P. Manuel and D. D. Khalyavin and F. Orlandi and R. S. Perry and R. D. Johnson and D. F. McMorrow},
  journal= {arXiv preprint arXiv:2006.12882},
  year   = {2020}
}

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6 pages, 4 figures (+ 11 pages, 3 figures of supplemental material)

Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal

Abstract

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