Magnetoimpedance of Electroplated Wires with Large Core Diameters
Magnetoimpedance of Electroplated Wires with Large Core Diameters作者机构：Magnet Laboratory Molecular Technology Research Unit School of Science Walailak University Electricity and Magnetism Properties Research Laboratory Department of Physics Faculty of Science Kasetsart University
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2009年第25卷第6期
页 面：825-828页
核心收录：
学科分类：081702[工学-化学工艺] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学]
基 金：supported by the Walailak Universitys Research Unit Fund
主 题：Magnetoimpedance Electroplated wire Copper Cobalt
摘 要：Monolayered Co and trilayered Co/Cu/Co were electroplated on 485 μm-diameter Cu wires using the bath pH 2.5. These wires can be functioned as magnetic sensors owing to their magnetoimpedance （MI） effect. By measuring at four different frequencies （100, 250, 500, and 1000 kHz） and Co thicknesses （2.5, 5.0, 10.0, and 25.0μm）, the MI ratio of electroplated Co on Cu wires tended to increase with increasing Co thickness and frequency of the driving current. The Co/Cu/Co on Cu wires exhibited even higher MI ratio. The magnetic layer also regulated the magnetic inductions and anisotropy regardless of the size of nonmagnetic core. Nevertheless, the diameter of the Cu core had a significant effect on the MI ratio. By comparing with the 47.7 μm-diameter Ag cores electroplated by Co and Co/Cu/Co of the same thickness, the Cu cores with a larger diameter gave rise to a larger MI ratio because their lower electrical resistance enhanced the crossing effect. Substantial MI ratio was observed even in a low frequency regime because the skin effect occurred at a low frequency in the case of electroplated wires with large core diameters.
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