摘要
在格林函数的理论框架下,采用一维自旋为1的各向异性Heisenberg模型来讨论Y2BaNiO5材料的磁学和热力学性质.得到了它的自旋关联函数、低激发谱、基态能(Eg)、比热(C)和静态磁化率(χ)在不同交换各向异性因子下的性质,所得结果与实验和数值模拟结果完全一致.
In this paper, within the frame of Green＇ s function theory, we study the magnetic and thermodynamic properties of the mixed- spin antiferromagnet Y2BaNiO5 in the spin-1 one-dimensional anisotropic Heisenberg model. We find the correlation function, low-lying excitation, ground-state energy, specific heat and static susceptibility of Y2BaNiO5 for different values of exchange anisotropic parameter γ, and the results are in good agreement with experimental and numerical results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期4865-4872,共8页
Acta Physica Sinica
基金
宝鸡文理学院重点科研基金(批准号:ZK2406
ZK2550)资助的课题.~~
