Broadband magnetoelastic coupling in magnonic-phononic crystals for high-frequency nanoscale spin-wave generation
Broadband magnetoelastic coupling in magnonic-phononic crystals for high-frequency nanoscale spin-wave generation
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DOI：
10.1103/physrevb.95.104425
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发表时间：
2017-03-20
影响因子：
3.7
通讯作者：
Krawczyk, Maciej
中科院分区：
文献类型：
--
作者：
Graczyk, Piotr;Klos, Jaroslaw;Krawczyk, Maciej
自旋波是先进技术中信息载体的一种很有前途的候选者。磁性纳米结构中自旋波与声波的相互作用由于其在自旋波产生、放大和转导等方面的潜在应用而备受关注。我们数值研究了由坡莫合金和钴交替层组成的一维磁声子晶体中的磁弹性激发动力学。我们使用的平面波方法和有限元方法的频域和时域模拟，分别。所研究的结构进行了优化的杂交特定的自旋波和声学色散分支在整个布里渊区在一个广泛的频率范围。我们表明，这种类型的周期性结构可以用于有效地产生高频自旋波。
Spin waves are promising candidates for information carriers in advanced technology. The interactions between spin waves and acoustic waves in magnetic nanostructures are of much interest because of their potential application for spin-wave generation, amplification, and transduction. We investigate numerically the dynamics of magnetoelastic excitations in a one-dimensional magnonic-phononic crystal consisting of alternating layers of permalloy and cobalt. We use the plane-wave method and the finite-element method for frequency- and time-domain simulations, respectively. The studied structure is optimized for hybridization of specific spin-wave and acoustic dispersion branches in the entire Brillouin zone in a broad frequency range. We show that this type of periodic structure can be used for efficient generation of high-frequency spin waves.