Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1799170 | Journal of Magnetism and Magnetic Materials | 2015 | 5 Pages |
•Dynamic properties of the magnetic nanoelements during the magnetization reversal are studied.•Spin-wave modes can be effectively manipulated by the element shapes.•Evolution of spin-wave modes reflects the magnetization-configuration change during reversal•Softening of edge mode or fundamental mode trigger the magnetization reversal.
We study the dynamic properties of magnetic nanoelements with tapered ends by using micromagnetic simulations. It is found that the spin-wave modes can be effectively manipulated by the element shape. With the increase of the end sharpness (described by tapering parameter h), the frequency of the spin-wave edge mode increases rapidly and its oscillation areas in the both ends of element gradually increase and move toward to the central area. Finally, the edge mode completely merges into the fundamental mode. During the magnetization reversal processes, the edge mode experiences one or two softening depending on h≤60 nm or 60 nm