Favieres Cristina, Vergara José, Madurga Vicente
Laboratory of Magnetism, Department of Science Physics, Public University of Navarre, Campus Arrosadía s/n, E-31006 Pamplona, Spain.
Institute for Advanced Materials and Mathematics, INAMAT2, Public University of Navarre, Campus Arrosadía s/n, E-31006 Pamplona, Spain.
Materials (Basel). 2020 Sep 24;13(19):4249. doi: 10.3390/ma13194249.
Charged magnetic domain walls have been visualized in soft magnetic nanostructured Fe thin films under both static and dynamic conditions. A transition in the core of these zigzagged magnetic walls from Néel-type to Bloch-type through the formation of crosstie walls has been observed. This transition in charged zigzagged walls was not previously shown experimentally in Fe thin films. For film thicknesses < 30 nm, Néel-type cores are present, while at ≈ 33 nm, walls with crosstie cores are observed. At > 60 nm, Bloch-type cores are observed. Along with the visualization of these critical parameters, the dependence on the film thickness of the characteristic angle and length of the segments of the zigzagged walls has been observed and analyzed. After measuring the bistable magneto-optical behavior, the values of the wall nucleation magnetic field and the surface roughness of the films, an energetic fit to these nucleation values is presented.
在静态和动态条件下，均已在软磁纳米结构铁薄膜中观察到带电磁畴壁。通过交叉壁的形成，已观察到这些锯齿状磁壁核心从奈尔型向布洛赫型的转变。这种带电锯齿状壁的转变以前在铁薄膜中未通过实验证明。对于厚度小于30nm的薄膜，存在奈尔型核心，而在约33nm时，观察到具有交叉核心的壁。在大于60nm时，观察到布洛赫型核心。除了这些关键参数的可视化之外，还观察并分析了锯齿状壁的特征角和段长度对薄膜厚度的依赖性。在测量双稳态磁光行为、壁成核磁场值和薄膜表面粗糙度之后，给出了对这些成核值的能量拟合。
