pH值对化学镀CoNiP复合丝GMI效应的影响  

Effect of pH on the Giant Magneto-impedance Properties of Cu/CoNiP Composite Wires prepared by Chemical Deposition

作　　者：张庚华[1] 程金科[1] 王清江[2] 袁望治[1] 赵振杰[1] 

机构地区：[1]华东师范大学物理系,纳光电集成与先进装备教育部工程研究中心,上海200062 [2]华东师范大学化学系

出　　处：《应用化学》2008年第11期1277-1280,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20575022);上海市科学技术委员会纳米中心基金(0652nm036;0752nm004)资助项目

摘　　要：用化学镀方法在直径为90μm的细铜丝镀上CoNiP铁磁层,制备出具有巨磁阻抗效应的复合结构丝。研究了镀液的pH值对化学镀的复合结构丝的特性和巨磁阻抗效应的影响。研究结果发现,镀液的pH值会影响镀层的成分和结构,进而影响复合结构丝的巨磁阻抗效应。镀液的pH值在一定范围内增大时,形成的镀层中Ni含量增加,Co、P含量减小,铁磁性镀层由环向磁结构转为纵向磁结构,最大阻抗比先增后减。镀液制备的样品在60 kHz时,ΔZ/Z的最大值为240%,具有很低的临界频率和很宽的频率应用范围。Cu/CoNiP composite wires were prepared by chemical deposition on Cu wires of 90 μm diameter. The influence of pH on the properties of the composite wires and the GMI effect was studied. It was found that pH can influence the composition and magnetic structure of the deposited layer, which affects the GMI effect of the composite wires. With the increase of pH in a certain range, the content of Ni in the deposited layer increases, and the contents of Co and P decrease. Increasing pH also results in the transformation of the magnetic deposited layer from longitudinal structure to transverse structure. The sample prepared by such a method can exhibit a maximum ΔZ/Z of 240% at 60 kHz, and it has a low critical frequency and a wide application frequency range.

关 键 词：巨磁阻抗效应 化学镀 CoNiP PH值 

分 类 号：O646.2[理学—物理化学]