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arXiv · 0903.1985

Magnetization plateaux in the classical Shastry-Sutherland lattice

M. Moliner·D. C. Cabra·A. Honecker·P. Pujol·F. Stauffer
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Abstract

We investigated the classical Shastry-Sutherland lattice under an external magnetic field in order to understand the recently discovered magnetization plateaux in the rare-earth tetraborides compounds RB$_4$. A detailed study of the role of thermal fluctuations was carried out by mean of classical spin waves theory and Monte-Carlo simulations. Magnetization quasi-plateaux were observed at 1/3 of the saturation magnetization at non zero temperature. We showed that the existence of these quasi-plateaux is due to an entropic selection of a particular collinear state. We also obtained a phase diagram that shows the domains of existence of different spin configurations in the magnetic field versus temperature plane.

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M. Moliner, D. C. Cabra, A. Honecker, P. Pujol, F. Stauffer. 2009-03-11. Magnetization plateaux in the classical Shastry-Sutherland lattice. https://doi.org/10.1088/1742-6596/145/1/012053

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