最近邻强交换相互作用对spin-1纳米管磁化强度的影响

Effect of Strong Exchange Interaction between Nearest-neighbor Atoms on spin-1 Nanotube Magnetization

利用有效场理论研究纳米管上最近邻原子间强交换相互作用对Blume-Capel模型磁化强度的影响,得到系统格点的磁化强度与最近邻强交换相互作用和晶格场强度的关系。结果表明,最近邻强交换相互作用和晶格场强度等诸多因素相互竞争,使系统表现出丰富的磁学特性:正晶格场促进系统的磁化强度,且系统仅发生二级相变;负晶格场抑制系统的磁化强度,且系统发生一级和二级相变;不同位置的强交换相互作用对系统的磁化强度影响程度不同。

The effect of strong exchange interaction between nearest-neighbor atoms on magnetization of Blume-Capel model was studied within the effective field theory,which indicates the relationship between magnetization and strong exchange interaction and crystal field.Results show that the strong exchange interactions of the nearest neighbor and the crystal field compete with each other,which makes the system performs rich magnetic characteristics.The magnetic intensity of the system is enhanced by the positive crystal field and only the second-order phase transition occurs in the system while the negative crystal field suppresses the magnetization of the system and the first and second-order phase transitions both occurs in the system.Furthermore strong exchange interactions at different locations have different effects on the magnetization of the system.