Classical Properties in Spin Dynamics in the S=2 One-Dimensional Heisenberg Antiferromagnet, CsCrCl3
Classical Properties in Spin Dynamics in the S=2 One-Dimensional Heisenberg Antiferromagnet, CsCrCl3
复制标题
S=2 一维海森堡反铁磁体 CsCrCl3 中自旋动力学的经典性质
DOI：
10.1143/jpsj.71.1148
复制
发表时间：
2002
影响因子：
1.7
通讯作者：
M. Bull
中科院分区：
文献类型：
--
作者：
S. Itoh;Hidekazu Tanaka;M. Bull
用非弹性中子散射实验研究了S=2一维海森堡反铁磁体CsCrCl3在三维有序化温度(TN=16K)以上的自旋动力学.从动态结构因子出发，推导出了静态关联函数。逆关联长度与温度呈线性关系，可用量子理论和经典理论描述，交换常数由磁激发的色散关系确定。还测定了动力学结构因子与温度的关系。我们证明了一维Heisenberg反铁磁系统的经典理论很好地描述了TN以上CsCrCl3中的自旋动力学。
We performed inelastic neutron scattering experiments, in order to investigate the spin dynamics in the S =2 one-dimensional (1D) Heisenberg antiferromagnet, CsCrCl 3 , above the three-dimensional ordering temperature ( T N =16 K). We deduced the static correlation function from the dynamical structure factor. The inverse correlation length showed a linear temperature dependence and was described by quantum and classical theories with the exchange constant determined from the dispersion relation of the magnetic excitations. The temperature dependence of the dynamical structure factor was also determined. We demonstrated that the spin dynamics in CsCrCl 3 above T N is quantitatively well described by classical theory for a 1D Heisenberg antiferromagnetic system.