Existence of the magnetization plateau in a class of exactly solvable Ising-Heisenberg chains

Details Existence of the magnetization plateau in a class of exactly solvable Ising-Heisenberg chains Existence of the magnetization plateau in a class of exactly solvable Ising-Heisenberg chains

2003-01-29

arxiv.org/abs/cond-mat/0301557v2

J. Phys.: Condens. Matter 15 (2003) 4519

Physics

Condensed Matter

Statistical Mechanics

16 pages, 10 figures, submitted to J. Phys: Condens. Matter

Scientific paper

10.1088/0953-8984/15/26/302

The mapping transformation technique is applied to obtain exact results for the spin-1/2 and spin-S (S=1/2,1) Ising-Heisenberg antiferromagnetic chain in the presence of an external magnetic field. Within this scheme, a field-induced first-order metamagnetic transition resulting in multiplateau magnetization curves, is investigated in detail. It is found that the scenario of the plateau formation depends fundamentally on the ratio between Ising and Heisenbrg interaction constants, as well as on the anisotropy strength of the XXZ Heisenberg interaction.

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