Spin wave eigenmodes in transversely magnetized thin film ferromagnetic wires
Spin wave eigenmodes in transversely magnetized thin film ferromagnetic wires
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DOI：
10.1103/physrevb.92.104424
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发表时间：
2015-09-21
影响因子：
3.7
通讯作者：
Lindner, Juergen
中科院分区：
文献类型：
--
作者：
Duan, Zheng;Krivorotov, Ilya N.;Lindner, Juergen
本文报道了横向磁化薄膜坡莫合金丝中自旋波本征模的实验和理论研究。利用宽带铁磁共振技术，我们测量了单根金属丝中自旋波本征模谱随磁场和金属丝宽度的变化。我们的分析模型和微磁学模拟的实验数据的比较表明，在横向磁化线的自旋波的固有偶极边缘钉扎是可以忽略的。我们的数据还量化了坡莫合金丝的非本征边缘钉扎程度。这项工作建立了动态磁化的边界条件，在横向磁化薄膜线的线宽和厚度的范围内研究，并提供了一个定量描述的自旋波本征模频率和空间分布在这个系统中作为线宽的函数。
We report experimental and theoretical studies of spin wave eigenmodes in transversely magnetized thin film Permalloy wires. Using broadband ferromagnetic resonance technique, we measure the spectrum of spin wave eigenmodes in individual wires as a function of magnetic field and wire width. Comparison of the experimental data to our analytical model and micromagnetic simulations shows that the intrinsic dipolar edge pinning of spin waves is negligible in transversely magnetized wires. Our data also quantify the degree of extrinsic edge pinning in Permalloy wires. This work establishes the boundary conditions for dynamic magnetization in transversely magnetized thin film wires for the range of wire widths and thicknesses studied, and provides a quantitative description of the spin wave eigenmode frequencies and spatial profiles in this system as a function of the wire width.