Multiferroic rust: magnetoelectric effect in g\"{o}thite, $\alpha$-FeOOH

N. V. Ter-Oganessian; A. A. Guda; V. P. Sakhnenko

doi:10.1038/s41598-017-16772-w

Multiferroic rust: magnetoelectric effect in g\"{o}thite, $\alpha$-FeOOH

Strongly Correlated Electrons 2017-11-28 v1 Materials Science

Authors: N. V. Ter-Oganessian , A. A. Guda , V. P. Sakhnenko

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Abstract

By means of symmetry analysis, density functional theory calculations, and Monte Carlo simulations we show that goethite, $\alpha$ -FeOOH, is a linear magnetoelectric below its N\'{e}el temperature $T_{\rm N}=400$ K. The experimentally observed magnetic field induced spin-flop phase transition results in either change of direction of electric polarization or its suppression. Calculated value of magnetoelectric coefficient is 0.24 $\mu$ C m $^{-2}$ T $^{-1}$ . The abundance of goethite in nature makes it arguably the most widespread magnetoelectric material.

Keywords

multiferroic magnetization magnetocaloric effect

Cite

@article{arxiv.1707.06109,
  title  = {Multiferroic rust: magnetoelectric effect in g\"{o}thite, $\alpha$-FeOOH},
  author = {N. V. Ter-Oganessian and A. A. Guda and V. P. Sakhnenko},
  journal= {arXiv preprint arXiv:1707.06109},
  year   = {2017}
}

Comments

10 pages, 2 figures, 2 tables

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