Betancourt Israel
Departamento de Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, D.F. 04510, Mexico.
Materials (Basel). 2010 Dec 23;4(1):37-54. doi: 10.3390/ma4010037.
Inductance spectroscopy is a particular formulation variant of the well known complex impedance formalism typically used for the electric characterization of dielectric, ferroelectric, and piezoelectric materials. It has been successfully exploited as a versatile tool for characterization of the magnetization dynamics in amorphous ribbons and wires by means of simple experiments involving coils for sample holding and impedance analyzer equipment. This technique affords the resolution of the magnetization processes in soft magnetic materials, in terms of reversible deformation of pinned domain walls, domain wall displacements and spin rotation, for which characteristic parameters such as the alloy initial permeability and the relaxation frequencies, indicating the dispersion of each process, can be defined. Additionally, these parameters can be correlated with chemical composition variation, size effects and induced anisotropies, leading to a more physical insight for the understanding of the frequency dependent magnetic response of amorphous alloys, which is of prime interest for the development of novel applications in the field of telecommunication and sensing technologies. In this work, a brief overview, together with recent progress on the magnetization dynamics of amorphous ribbons, wires, microwires and biphase wires, is presented and discussed for the intermediate frequency interval between 10 Hz and 13 MHz.
电感光谱法是一种著名的复阻抗形式的特定公式变体，通常用于介电、铁电和压电材料的电学表征。通过涉及用于样品夹持的线圈和阻抗分析仪设备的简单实验，它已成功地用作表征非晶带材和线材中磁化动力学的通用工具。该技术能够解析软磁材料中的磁化过程，具体表现为钉扎畴壁的可逆变形、畴壁位移和自旋旋转，为此可以定义诸如合金初始磁导率和弛豫频率等特征参数，这些参数表明了每个过程的色散情况。此外，这些参数可以与化学成分变化、尺寸效应和诱导各向异性相关联，从而为理解非晶合金的频率相关磁响应提供更深入的物理见解，这对于电信和传感技术领域新型应用的开发至关重要。在这项工作中，针对10 Hz至13 MHz的中频区间，给出并讨论了关于非晶带材、线材、微丝和双相丝磁化动力学的简要概述以及近期进展。
