Alekhina Iuliia, Kolesnikova Valeria, Rodionov Vladimir, Andreev Nikolai, Panina Larissa, Rodionova Valeria, Perov Nikolai
Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1-2, 119991 Moscow, Russia.
Institute of Physics, Mathematics & IT, Immanuel Kant Baltic Federal University, Gaidara 6, 236041 Kaliningrad, Russia.
Nanomaterials (Basel). 2021 Jan 21;11(2):274. doi: 10.3390/nano11020274.
The tunable magnetic properties of amorphous ferromagnetic glass-coated microwires make them suitable for a wide range of applications. Accurate knowledge of the micromagnetic structure is highly desirable since it affects almost all magnetic properties. To select an appropriate wire-sample for a specific application, a deeper understanding of the magnetization reversal process is required, because it determines the measurable response (such as induced voltage waveform and its spectrum). However, the experimental observation of micromagnetic structure of micro-scale amorphous objects has strict size limitations. In this work we proposed a novel experimental technique for evaluating the microstructural characteristics of glass-coated microwires. The cross-sectional permeability distribution in the sample was obtained from impedance measurements at different frequencies. This distribution enables estimation of the prevailing anisotropy in the local region of the wire cross-section. The results obtained were compared with the findings of magnetostatic measurements and remanent state analysis. The advantages and limitations of the methods were discussed.
非晶铁磁玻璃包覆微丝的可调磁性能使其适用于广泛的应用。由于微磁结构几乎影响所有磁性能，因此准确了解微磁结构非常必要。为了为特定应用选择合适的丝样，需要更深入地了解磁化反转过程，因为它决定了可测量的响应（如感应电压波形及其频谱）。然而，对微观尺度非晶物体微磁结构的实验观察有严格的尺寸限制。在这项工作中，我们提出了一种评估玻璃包覆微丝微观结构特征的新颖实验技术。通过在不同频率下的阻抗测量获得了样品中的横截面磁导率分布。这种分布能够估计丝横截面局部区域中占主导的各向异性。将获得的结果与静磁测量和剩磁状态分析的结果进行了比较。讨论了这些方法的优缺点。
