中国物理B ›› 2015, Vol. 24 ›› Issue (9): 97503-097503.doi: 10.1088/1674-1056/24/9/097503

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Shape-manipulated spin-wave eigenmodes of magnetic nanoelements

张光富a b, 李志雄a, 王希光a, 聂耀庄a, 郭光华a   

  1. a School of Physics and Electronics, Central South University, Changsha 410083, China;
    b School of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China
  • 收稿日期:2015-01-25 修回日期:2015-03-30 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11374373), the Doctoral Fund of Ministry of Education of China (Grant No. 20120162110020), the Natural Science Foundation of Hunan Province of China (Grant No. 13JJ2004), and the Science and Technology Planning of Yiyang City of Hunan Province of China (Grant No. 2014JZ54).

Shape-manipulated spin-wave eigenmodes of magnetic nanoelements

Zhang Guang-Fu (张光富)a b, Li Zhi-Xiong (李志雄)a, Wang Xi-Guang (王希光)a, Nie Yao-Zhuang (聂耀庄)a, Guo Guang-Hua (郭光华)a   

  1. a School of Physics and Electronics, Central South University, Changsha 410083, China;
    b School of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China
  • Received:2015-01-25 Revised:2015-03-30 Online:2015-09-05 Published:2015-09-05
  • Contact: Guo Guang-Hua E-mail:guogh@mail.csu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11374373), the Doctoral Fund of Ministry of Education of China (Grant No. 20120162110020), the Natural Science Foundation of Hunan Province of China (Grant No. 13JJ2004), and the Science and Technology Planning of Yiyang City of Hunan Province of China (Grant No. 2014JZ54).

摘要: The magnetization dynamics of nanoelements with tapered ends have been studied by micromagnetic simulations. Several spin-wave modes and their evolutions with the sharpness of the element ends are characterized. The edge mode localized in the two ends of the element can be effectively tuned by the element shape. Its frequency increases rapidly with the tapered parameter h and its localized area gradually expands toward the element center, and it finally merges into the fundamental mode at a critical tapered parameter h0. For nanoelements with h > h0, the edge mode is completely suppressed. The standing spin-wave modes mainly in the internal area of the element are less affected by the element shape. The shifts of their frequencies are small and they display different tendencies. The evolution of the spin-wave modes with the element shape is explained by considering the change of the internal field.

关键词: ferromagnetic resonance, spin-wave mode, micromagnetic simulation, magnetic nanoelement

Abstract: The magnetization dynamics of nanoelements with tapered ends have been studied by micromagnetic simulations. Several spin-wave modes and their evolutions with the sharpness of the element ends are characterized. The edge mode localized in the two ends of the element can be effectively tuned by the element shape. Its frequency increases rapidly with the tapered parameter h and its localized area gradually expands toward the element center, and it finally merges into the fundamental mode at a critical tapered parameter h0. For nanoelements with h > h0, the edge mode is completely suppressed. The standing spin-wave modes mainly in the internal area of the element are less affected by the element shape. The shifts of their frequencies are small and they display different tendencies. The evolution of the spin-wave modes with the element shape is explained by considering the change of the internal field.

Key words: ferromagnetic resonance, spin-wave mode, micromagnetic simulation, magnetic nanoelement

中图分类号:  (Dynamic properties?)

  • 75.40.Gb
75.40.Mg (Numerical simulation studies) 76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance) 75.75.-c (Magnetic properties of nanostructures)