|
|
几何形态对铁纳米环磁特性的影响
|
Abstract:
本文采用Monte Carlo方法，对铁纳米环的磁化动力学进行模拟。研究发现，铁纳米环的几何条件会影响到铁纳米环的磁化行为，同时，外场的变化会导致铁纳米环在磁化过程中出现不同的自旋组态，如洋葱态、涡旋态和反向洋葱态等。进一步的研究发现，铁纳米环涡旋态的稳定性及过渡态的数量与系统的内外半径明显相关。
Base on Monte Carlo method, the magnetic dynamics properties of Fe nanorings are studied. The study found that the magnetization behaviors of Fe nanorings are influenced by their geometry. At the same time, the change of the external field will lead to different spin configurations of the Fe nanoring in the magnetization process, such as onion-type-states, vortex-type-states and re-verse onion-type-states, and so on. Further study shows that the stability of the vor-tex-type-states and the number of transition states of the Fe nanoring are significantly related to the inner and outer radius of the system.
| [1] | Liu, H., Wei, H., Liu, Y., Han, X., Yu, G., Zhan, W., Gall, S.L., Lu, Y., Hehn, M., Mangin, S., Sun, M., Liu, Y. and Horng, C. (2018) Magnetic Configurations and State Diagram of Nanoring Magnetic Tunnel Junctions. Physical Review Applied, 10, Article ID: 054013. https://doi.org/10.1103/PhysRevApplied.10.054013 |
| [2] | 徐耀良, 叶泳, 栾柏松. 采用轴承专用磨床加工瓦片状钕铁硼磁性材料的技术可行性研究[J]. 冶金与材料, 2017, 37(5): 18-19. |
| [3] | 赵莲红. 卤胺/SiO2杂化抗菌纳米和磁性纳米材料的制备及性能研究[D]: [硕士学位论文]. 上海: 上海师范大学, 2014. |
| [4] | Mehta, R.V. (2017) Synthesis of Magnetic Nanoparticles and Their Dispersions with Special Reference to Application in Biomedicine and Biotechnology. Materials Science and Engineering, 79, 901-916.
https://doi.org/10.1016/j.msec.2017.05.135 |
| [5] | 林枝钦. 纳米环的磁特性的数值计算[D]: [硕士学位论文]. 福州: 福建师范大学, 2009. |
| [6] | 丁澜, 马锡英, 黄仕华. SiGe纳米环的制备与电磁特性研究进展[J]. 微纳电子技术, 2010, 47(11): 668-673. |
| [7] | 宁思同, 高希宇, 黄运欢, 殷丽艳. 劈裂纳米环多极表面等离激元共振及折射率传感特性分析[J]. 核聚变与等离子体物理, 2015(1): 79-85. |
| [8] | 缪晶晶, 张潇元, 史友进, 张海洋, 许宁. 石墨烯纳米环的电子结构和持续电流[J]. 应用物理, 2017, 7(3): 71-76. |
| [9] | 王兆华, 杨健, 任立庆, 王憨鹰. 不对称纳米环/椭球二聚体的高阶表面等离激元共振特性[J]. 科学技术与工程, 2019, 19(15): 20-23. |
| [10] | Ye, Q., Chen, S., Zhang, J., Li, M. and Huang, Z. (2019) Numerical Simulation of Magnetic Properties for Co Asymmetric Nanorings. International Journal of Modern Physics B, 33, Article ID: 1950155.
https://doi.org/10.1142/S0217979219501558 |
| [11] | Ye, Q.Y., Chen, S.Y., Huang, S.K., Wu, J.L., Xu, J.Y., Wang, W.J., Fan, W.L. and Huang, Z.G. (2019) Magnetic Dynamic Properties of Defective Cobalt Nanorings: Monte Carlo Simulation. Journal of Magnetism and Magnetic Materials, 473, 301-305. https://doi.org/10.1016/j.jmmm.2018.10.038 |
