双模随机晶体场对混合自旋1/2和自旋1纳米管磁化强度的影响

Effects of bimodal random crystal field on magnetic properties of mixed spin-1/2 and spin-1 on nanotube

摘要:

本文利用有效场论研究了原子掺杂对纳米管晶格点磁化强度的影响. 结果表明, 掺杂程度、晶场取值概率、最近邻交换相互作用与晶场强度相互竞争, 使系统具有丰富的磁化特性. 当负晶场作用于系统时, 系统发生一级相变. 负晶场越强, 对系统磁化强度的阻碍作用越明显. 当晶场参数和掺杂程度不同时, 系统磁化强度随温度的变化表现出奇异性.

Abstract:

The effect of atomic doping on the magnetization of nanotube lattice points was studied by using the effective field theory. The results show that the doping degree, the probability of crystal field values, the nearest neighbor exchange interaction and the crystal field strength compete with each other, which make the system show rich magnetic characteristics. When the negative crystal field acts on the system, the first-order phase transition occurs. The stronger the negative crystal field, the more obvious the hindrance to the magnetization of the system.When the parameters and doping modes of crystal field are different, the evolution of the magnetization intensity on temperature exhibits unusual behaviors.