Spin excitation spectrum in a magnetic nanodot with continuous transitions between the vortex, Bloch-type skyrmion, and Neel-type skyrmion states
Spin excitation spectrum in a magnetic nanodot with continuous transitions between the vortex, Bloch-type skyrmion, and Neel-type skyrmion states
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DOI：
10.1103/physrevb.95.094414
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发表时间：
2017-03-13
影响因子：
3.7
通讯作者：
Guslienko, K. Y.
中科院分区：
文献类型：
--
作者：
Mruczkiewicz, M.;Krawczyk, M.;Guslienko, K. Y.
我们研究了在不同的非均匀，拓扑非平凡的磁化状态，特别是涡旋和skyrmion状态的圆形铁磁纳米点的自旋波激发。平面外磁各向异性和Dzyaloshinskiii-Moriya交换相互作用强度的逐渐变化导致不同稳定磁性配置之间的连续相变，并允许formapping动态自旋模式中和之间的涡旋，布洛赫型skyrmion和尼尔型skyrmion状态。我们的研究阐明了在这些不同的稳定磁化状态的旋向模式，方位角自旋波，呼吸模式之间的连接，并帮助我们了解丰富的自旋激发光谱的skyrmion背景。
We study spin-wave excitations in a circular ferromagnetic nanodot in different inhomogeneous, topologically nontrivial magnetization states, specifically, vortex and skyrmion states. Gradual change in the strength of the out-of-plane magnetic anisotropy and the Dzyaloshinskii-Moriya exchange interaction leads to continuous phase transitions between different stablemagnetic configurations and allows formapping of dynamic spin modes in and between the vortex, Bloch-type skyrmion, and Neel-type skyrmion states. Our study elucidates the connections between gyrotropic modes, azimuthal spin waves, and breathing modes in these various stable magnetization states and helps us to understand the rich spin excitation spectrum on the skyrmion background.