Wave modes of collective vortex gyration in dipolar-coupled-dot-array magnonic crystals.
Wave modes of collective vortex gyration in dipolar-coupled-dot-array magnonic crystals.
复制标题
偶极耦合点阵列宏伟晶体中集体涡流回旋的波模式。
DOI:
10.1038/srep02262
复制
发表时间:
2013
影响因子:
4.6
通讯作者:
Kim, Sang-Koog
中科院分区:
文献类型:
--
作者:
Han, Dong-Soo;Vogel, Andreas;Jung, Hyunsung;Lee, Ki-Suk;Weigand, Markus;Stoll, Hermann;Schuetz, Gisela;Fischer, Peter;Meier, Guido;Kim, Sang-Koog
Lattice vibration modes are collective excitations in periodic arrays of atoms or molecules. These modes determine novel transport properties in solid crystals. Analogously, in periodical arrangements of magnetic vortex-state disks, collective vortex motions have been predicted. Here, we experimentally observe wave modes of collective vortex gyration in one-dimensional (1D) periodic arrays of magnetic disks using time-resolved scanning transmission x-ray microscopy. The observed modes are interpreted based on micromagnetic simulation and numerical calculation of coupled Thiele equations. Dispersion of the modes is found to be strongly affected by both vortex polarization and chirality ordering, as revealed by the explicit analytical form of 1D infinite arrays. A thorough understanding thereof is fundamental both for lattice vibrations and vortex dynamics, which we demonstrate for 1D magnonic crystals. Such magnetic disk arrays with vortex-state ordering, referred to as magnetic metastructure, offer potential implementation into information processing devices.
登录
查看更多内容
影响因子:
3.5
作者:
Khitun, Alexander;Nikonov, Dmitri E.;Wang, Kang L.
通讯作者:
Wang, Kang L.
影响因子:
17.1
作者:
Jung, Hyunsung;Choi, Youn-Seok;Kim, Sang-Koog
通讯作者:
Kim, Sang-Koog
影响因子:
4
作者:
Hansen, Ulf-Hendrik;Demidov, Vladislav E.;Demokritov, Sergej O.
通讯作者:
Demokritov, Sergej O.
影响因子:
4
作者:
Kim, Sang-Koog;Lee, Ki-Suk;Han, Dong-Soo
通讯作者:
Han, Dong-Soo
影响因子:
3.4
作者:
Barman, Anjan;Barman, Saswati;Otani, Y.
通讯作者:
Otani, Y.