Multiferroic rust: magnetoelectric effect in göthite, $\alpha$-FeOOH

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

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 Néel temp…