Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3

Yusuke Nambu; Kenya Ohgushi; Shunpei Suzuki; Fei Du; Maxim Avdeev; Yoshiya Uwatoko; Koji Munakata; Hiroshi Fukazawa; Songxue Chi; Yutaka Ueda; Taku J Sato

doi:10.1103/PhysRevB.85.064413

Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3

Strongly Correlated Electrons 2015-06-04 v1 Superconductivity

Authors: Yusuke Nambu , Kenya Ohgushi , Shunpei Suzuki , Fei Du , Maxim Avdeev , Yoshiya Uwatoko , Koji Munakata , Hiroshi Fukazawa , Songxue Chi , Yutaka Ueda , Taku J Sato

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Abstract

Magnetism in the insulating BaFe $_2$ Se $_3$ was examined through susceptibility, specific heat, resistivity and neutron diffraction measurements. After formation of a short-range magnetic correlation, a long-range ordering was observed below $T_{\rm N}\sim 255$ K. The transition is obscured by bulk properties. Magnetic moments ( $\parallel a$ ) are arranged to form a Fe $_4$ ferromagnetic unit, and each Fe $_4$ stacks antiferromagnetically. This block magnetism is of the third type among magnetic structures of ferrous materials. The magnetic ordering drives unusually large distortion via magnetoelastic coupling.

Keywords

iron-based spin-ladder block magnetism magnetoelastic coupling neutron diffraction long-range ordering BaFe2Se3 ferromagnetic unit antiferromagnetic stacking

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@article{arxiv.1202.5371,
  title  = {Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3},
  author = {Yusuke Nambu and Kenya Ohgushi and Shunpei Suzuki and Fei Du and Maxim Avdeev and Yoshiya Uwatoko and Koji Munakata and Hiroshi Fukazawa and Songxue Chi and Yutaka Ueda and Taku J Sato},
  journal= {arXiv preprint arXiv:1202.5371},
  year   = {2015}
}

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5 pages, 4 figures

Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3

Abstract

Keywords

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