Two-dimensional frustrated spin systems in high magnetic fields

Details Two-dimensional frustrated spin systems in high magnetic fields Two-dimensional frustrated spin systems in high magnetic fields

2006-09-15

arxiv.org/abs/cond-mat/0609381v1

Journal of Physics: Conference Series 51 (2006) 207

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures, proceedings of RHMF 2006

Scientific paper

10.1088/1742-6596/51/1/048

We discuss our numerical results on the properties of the S = 1/2 frustrated J1-J2 Heisenberg model on a square lattice as a function of temperature and frustration angle phi = atan(J2/J1) in an applied magnetic field. We cover the full phase diagram of the model in the range -pi <= phi <= pi. The discussion includes the parameter dependence of the saturation field itself, and addresses the instabilities associated with it. We also discuss the magnetocaloric effect of the model and show how it can be used to uniquely determine the effective interaction constants of the compounds which were investigated experimentally.

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