Self-consistent mean-field theory of the XXZ ferrimagnetic spin chain with single-ion anisotropy

The extended self-consistent mean-field theory is applied to study the XXZ ferrimagnetic spin chain with single-ion anisotropy. Based on the effects of XXZ anisotropy lambda and single-ion anisotropy D, we calculate the energy excitation spectrums, energy gaps, static uniform susceptibility and specific heat. The magnetization plateau of ferrimagnetic spin chain with single-ion anisotropy D disappears at the critical point D-c = 1.335. (C) 2014 Elsevier B.V. All rights reserved.Physics, Condensed MatterSCI(E)EI1ARTICLEyinxiangl@hotmail.com116-2045