Three-dimensional shape dependence of spin-wave modes in single FePt nanomagnets
Three-dimensional shape dependence of spin-wave modes in single FePt nanomagnets
复制标题
单 FePt 纳米磁体中自旋波模式的三维形状依赖性
DOI：
10.1103/physrevb.86.094426
复制
发表时间：
2012
影响因子：
3.7
通讯作者：
H. Schmidt
中科院分区：
文献类型：
--
作者：
R. Brandt;F. Ganss;R. Rückriem;T. Senn;C. Brombacher;P. Krone;M. Albrecht;H. Schmidt
We report the dependence of the intrinsic spin-wave spectra on the three-dimensional shape in single FePt nanomagnetic elements. In contrast to the well-known center and edge modes in flat, circular nanodisks, curved nanomagnets with identical nominal thickness and footprint exhibit a rich multimode spectrum with qualitatively different dependence on applied field, such as a low-frequency “pinned” mode. Dynamic micromagnetic modeling shows that the experimentally observed modes originate from different sections of the nanomagnet with vastly different demagnetization fields. Thus, controlled shaping of a nanomagnet in all three dimensions creates the possibility of magnetization dynamics by design.
