Shape-manipulated spin-wave eigenmodes of magnetic nanoelements  

作　　者：张光富 李志雄 王希光 聂耀庄 郭光华 

机构地区：[1]School of Physics and Electronics,Central South University [2]School of Communication and Electronic Engineering,Hunan City University

出　　处：《Chinese Physics B》2015年第9期513-517,共5页中国物理B（英文版）

基　　金：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);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.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 

分 类 号：TB383.1[一般工业技术—材料科学与工程]