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arXiv 1708.04178cond-mat.mes-hall
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Fe-N薄膜中弱条畴的磁化动力学:多技术互补方法

Magnetization dynamics of weak stripe domains in Fe-N thin films: a multi-technique complementary approach

S. Camara, S. Tacchi, L. -C. Garnier, M. Eddrief, F. Fortuna, G. Carlotti, M. Marangolo

摘要:

利用布里渊光散射和宽带铁磁共振实验,结合微磁学模拟,研究了注入氮的Fe ~(3+)-FeN的共振本征模.在弱条纹的存在下的动态本征模的频谱是非常丰富的,并且可以使用不同的技术或不同的实验配置来选择性地检测两个不同的模式族。注意的是支付的模式频率和空间分布的演变下的应用程序的外部磁场,可变强度,在平行或横向的条纹的方向。模式随外部磁场的不同演化伴随着特定区域中的独特空间定位,例如条带表面处的闭合畴和条带内部的体畴。BLS和FMR技术的互补性,基于不同的选择规则,被发现是一个富有成效的工具,用于研究通常在纳米结构中发现的丰富的局部磁激发。

英文摘要:

The resonant eigenmodes of a nitrogen-implanted iron α'-FeN characterized by weak stripe domains are investigated by Brillouin light scattering and broadband ferromagnetic resonance experiments, assisted by micromagnetic simulations. The spectrum of the dynamic eigenmodes in the presence of the weak stripes is very rich and two different families of modes can be selectively detected using different techniques or different experimental configurations. Attention is paid to the evolution of the mode frequencies and spatial profiles under the application of an external magnetic field, of variable intensity, in the direction parallel or transverse to the stripes. The different evolution of the modes with the external magnetic field is accompanied by a distinctive spatial localization in specific regions, such as the closure domains at the surface of the stripes and the bulk domains localized in the inner part of the stripes. The complementarity of BLS and FMR techniques, based on different selection rules, is found to be a fruitful tool for the study of the wealth of localized mag-netic excitations generally found in nanostructures.

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