用于高频传感器应用的坡莫合金/银多层板非对称磁阻

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2024-11-21 DOI:10.1016/j.surfcoat.2024.131580

A. de Moraes , F. Bohn , M. Gamino , E.F. da Silva , D.F. de Oliveira , C. Lopes , A. Ferreira , F. Vaz , M.A. Correa

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引用次数: 0

摘要

由于可以在零磁场附近调整线性响应，非对称磁阻效应在传感器应用中具有很大的吸引力。通常情况下，对于给定的薄膜几何形状，这种响应是在两种不同的铁磁材料被非铁磁性金属隔开的情况下获得的。这里介绍的是一种仅考虑一种铁磁材料就能获得非对称磁阻响应的新方法。更具体地说，Ni81Fe19（Py）/Ag 多层材料的双相行为是由连续 Py 层的铁磁特性的改变造成的。这些改性导致了具有高原的准静态磁化曲线，在磁化动力学中反映为不对称的磁阻响应。为了支持上述发现，我们考虑了结构和形态特征。在 2.06 GHz 频率下，低磁场范围内的强线性使灵敏度达到 38mΩ/Oe。这些结果简化了生产具有可调线性响应的传感器元件的实验程序。

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Asymmetrical magnetoimpedance on Permalloy/Ag multilayer for high-frequency sensor applications

The asymmetrical magnetoimpedance effect has a great appeal for sensor application due to the possibility of tuning a linear response near zero magnetic field. Usually, for a given thin film geometry, this response is obtained considering two distinct ferromagnetic materials separated by a non-ferromagnetic metal. Here a new route to obtain the asymmetrical magnetoimpedance response considering just one ferromagnetic material is presented. More specifically, Ni₈₁Fe₁₉ (Py)/Ag multilayer where the modification of the ferromagnetic properties of the successive Py layers is responsible for the biphasic behavior. These modifications lead to quasi-static magnetization curves with plateaus, which are reflected in the magnetization dynamics as the asymmetrical magnetoimpedance response. To support the presented findings, structural and morphological characterization is considered. The strong linearity at a low magnetic field range allowed to reach the sensitivity of

38 m Ω / Oe

for a frequency of 2.06 GHz. The results simplify the experimental procedure to produce sensor elements with tunable linearity response.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.