Yj. Wang et al., MAGNETIZATION CURVE FOR ONE-DIMENSIONAL HUBBARD-MODEL IN CRITICAL REGION, Communications in Theoretical Physics, 26(2), 1996, pp. 153-158
A power series expression of the exact solution of the one-dimensional
(1D) Hubbard model in an external magnetic field is derived to study
the antiferromagnet-ferromagnet transition in the critical region. Asi
de from the magnetization curve, the critical field and susceptibility
are analytically evaluated, and the results of these quantities in so
me limiting cases are discussed.