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Influence of lattice distortions in classical spin systems

D. C. Cabra, M. Moliner, F. Stauffer

cond-mat.str-elarXiv:cond-mat/0603514

Abstract

We investigate a simple model of a frustrated classical spin chain coupled to adiabatic phonons under an external magnetic field. A thorough study of the magnetization properties is carried out both numerically and analytically. We show that already a moderate coupling with the lattice can stabilize a plateau at 1/3 of the saturation and discuss the deformation of the underlying lattice in this phase. We also study the transition to saturation where either a first or second order transition can occur, depending on the couplings strength.

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