Magnetization plateau in S=3/2 antiferromagnetic Heisenberg chain with anisotropy
Abstract
The magnetization process of the S=3/2 antiferromagnetic Heisenberg chain with the single-ion anisotropy D at T=0 is investigated by the exact diagonalization of finite clusters and finite-size scaling analyses. It is found that a magnetization plateau appears at m=1/2 for D>Dc=0.93 0.01. The phase transition with respect to D at Dc is revealed to be the Kosterlitz-Thouless-type. The magnetization curve of the infinite system is also presented for some values of D.
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