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 RB4. 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.
Información general
Fecha de publicación:febrero 2009
Idioma del documento:Inglés
Revista:Journal of Physics: Conference Series; vol. 145, no. 1
Evento:4th International Conference on Highly Frustrated Magnetism 2008, HFM 2008