Itinerant G-type antiferromagnetic order in SrCr$_2$As$_2$

Pinaki Das; N. S. Sangeetha; George R. Lindemann; T. W. Heitmann; A. Kreyssig; A. I. Goldman; R. J. McQueeney; D. C. Johnston; D. Vaknin

doi:10.1103/PhysRevB.96.014411

Itinerant G-type antiferromagnetic order in SrCr$_2$As$_2$

Strongly Correlated Electrons 2017-07-12 v1

Authors: Pinaki Das , N. S. Sangeetha , George R. Lindemann , T. W. Heitmann , A. Kreyssig , A. I. Goldman , R. J. McQueeney , D. C. Johnston , D. Vaknin

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Abstract

Neutron diffraction and magnetic susceptibility studies of a polycrystalline SrCr $_2$ As $_2$ sample reveal that this compound is an itinerant G-type antiferromagnet below the N ${\rm \acute{e}}$ el temperature $T_{\textrm N}$ = 590(5) K with the Cr magnetic moments aligned along the tetragonal $c$ axis. The system remains tetragonal to the lowest measured temperature ( $\sim$ 12 K). The lattice parameter ratio $c/a$ and the magnetic moment saturate at about the same temperature below $\sim$ 200 K, indicating a possible magnetoelastic coupling. The ordered moment, $\mu=1.9(1)~\mu_{\rm B}$ /Cr, measured at $T = 12$ K, is significantly reduced compared to its localized value ( $4~\mu_{\rm B}$ /Cr) due to the itinerant character brought about by the hybridization between the Cr $3d$ and As $4p$ orbitals.

Keywords

magnetic structure magnetic materials and spin systems frustrated magnetism

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@article{arxiv.1705.04246,
  title  = {Itinerant G-type antiferromagnetic order in SrCr$_2$As$_2$},
  author = {Pinaki Das and N. S. Sangeetha and George R. Lindemann and T. W. Heitmann and A. Kreyssig and A. I. Goldman and R. J. McQueeney and D. C. Johnston and D. Vaknin},
  journal= {arXiv preprint arXiv:1705.04246},
  year   = {2017}
}

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6 pages, 5 figures

Itinerant G-type antiferromagnetic order in SrCr$_2$As$_2$

Abstract

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