Magnetization Process of the Classical Heisenberg Model on the Shastry-Sutherland Lattice

Details Magnetization Process of the Classical Heisenberg Model on the Shastry-Sutherland Lattice Magnetization Process of the Classical Heisenberg Model on the Shastry-Sutherland Lattice

2008-09-30

arxiv.org/abs/0809.5249v2

Phys. Rev. B 79, 144401 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 11 figures

Scientific paper

10.1103/PhysRevB.79.144401

We investigate classical Heisenberg spins on the Shastry-Sutherland lattice and under an external magnetic field. A detailed study is carried out both analytically and numerically by means of classical Monte-Carlo simulations. Magnetization pseudo-plateaux are observed around 1/3 of the saturation magnetization for a range of values of the magnetic couplings. We show that the existence of the pseudo-plateau is due to an entropic selection of a particular collinear state. A phase diagram that shows the domains of existence of those pseudo-plateaux in the $(h, T)$ plane is obtained.

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