| 引用本文： |
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李晓杰,王渺渺,刘萍,刘香菊.外磁场对纳米管上Blume-Capel模型磁热性能的研究[J].低温物理学报,2020,(5):228-235. [点击复制]
- LI XiaoJie,WANG Miaomiao,LIU ping,LIU Xiangju.Research of the Magnetic and Thermal Properties of Blume-Capel Model on Nanotube Under External Magnetic Field[J].LOW TEMPERATURE PHYSICAL LETTERS,2020,(5):228-235. [点击复制]
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| 摘要: |
| 利用有效场理论研究了纳米管上外磁场中Blume-Capel模型格点的磁化强度、磁化率、内能、比热和自由能,得到了系统格点的磁化强度、磁化率、内能、比热和自由能与外磁场和晶场的关系.结果表明:外磁场强度、交换相互作用和晶场强度等诸多因素相互竞争,使系统表现出比没有外磁场作用的Blume-Capel模型更为丰富的磁学特性;外磁场能够增大系统格点的磁化强度,导致系统的二级相变消失;负晶场作用系统时,系统会发生一级相变;晶场强度、外磁场强度不同时,系统的磁化率、内能、比热和自由能也呈现出复杂性. |
| 关键词: 外磁场 磁热性质 有效场理论 Blume-Capel模型 纳米管 |
| DOI： |
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| 基金项目: |
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| Research of the Magnetic and Thermal Properties of Blume-Capel Model on Nanotube Under External Magnetic Field |
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LI XiaoJie1, WANG Miaomiao1, LIU ping2, LIU Xiangju1
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| (1.Qilu Institute of Technology, Jinan, 250200;2.Qilu Normal University Chinese Literature, Jinan, 250200) |
| Abstract: |
| The magnetization, magnetic susceptibility, internal energy, specific heat and free energy of spin-1 Blume-Capel model on a cylindrical Ising nanotube with external magnetic field were investigated. The results show that the magnetic properties of the system are richer than those of the Blume-Capel model without the interaction of the external magnetic field. The external magnetic field can increase the magnetization of the lattice points of the system and cause the second-order phase transition of the system to disappear. When the crystal field is strong, the system will produce a first-order phase transition, but with the increase of temperature, the lattice points of the system will show magnetism again. The magnetic susceptibility of the system varies with the strength of the crystal field. The magnetic susceptibility, internal energy, specific heat and free energy of the system are also complicated. |
| Key words: external magnetic field, magnetic and thermal properties, effective field theory, Blume-Capel model, nanotube |
