Local magnetic anisotropy in BaFe$_2$As$_2$: a polarized inelastic neutron scattering study

N. Qureshi; P. Steffens; S. Wurmehl; S. Aswartham; B. Büchner; M. Braden

doi:10.1103/PhysRevB.86.060410

Local magnetic anisotropy in BaFe$_2$As$_2$: a polarized inelastic neutron scattering study

Superconductivity 2013-10-17 v1

Authors: N. Qureshi , P. Steffens , S. Wurmehl , S. Aswartham , B. Büchner , M. Braden

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Abstract

The anisotropy of the magnetic excitations in BaFe $_2$ As $_2$ was studied by polarized inelastic neutron scattering which allows one to separate the components of the magnetic response. Despite the in-plane orientation of the static ordered moment we find the in-plane polarized magnons to exhibit a larger gap than the out-of-plane polarized ones indicating very strong single-ion anisotropy within the layers. It costs more energy to rotate a spin within the orthorhombic {\it a-b} plane than rotating it perpendicular to the FeAs layers.

Keywords

local magnetic anisotropy BaFe$_2$As$_2$ polarized inelastic neutron scattering magnetic excitations single-ion anisotropy magnons

Cite

@article{arxiv.1201.2332,
  title  = {Local magnetic anisotropy in BaFe$_2$As$_2$: a polarized inelastic neutron scattering study},
  author = {N. Qureshi and P. Steffens and S. Wurmehl and S. Aswartham and B. Büchner and M. Braden},
  journal= {arXiv preprint arXiv:1201.2332},
  year   = {2013}
}

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4 pages, 4 figures

Local magnetic anisotropy in BaFe$_2$As$_2$: a polarized inelastic neutron scattering study

Abstract

Keywords

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