摘要
对直径为40μm,长为5cm的褪膜玻璃包裹钴基(Co69.20Fe4.16Si12.35B10.77Cr3.42Mo0.1)非晶丝进行电流退火和电流应力退火,研究了退火对巨磁阻抗效应的影响.结果发现,随着退火电流密度和外加应力的增大,丝的磁阻抗变化对外加磁场的敏感度先增大后减小,在20A/mm2和90MPa的退火条件下,灵敏度最高,可达1%/(A.m-1).以上述条件退火,敏感度最高可达19%/(A.m-1).
Co-based（Co69.20Fe4.16Si12.35B10.77Cr3.42Mo0.1） amorphous microwires with 40 μm in diameter and 5 cm in length,were annealed by Joule current and by stress Joule annealing. The relationship between giant magneto-impedance effect and the density of annealing current and the intensity of stress was investigated. The results showed that the GMI ratios firstly increase then decrease with the increase of the density of current and the intensity of the stress. The maximum of sensitivity of GMI ratios to applied field is 1G/（ A · m^-1 ） at 20 A/mm^2 and 90 MPa. The sensitivity of wires which were annealed with these conditions can be 19%（A · m^-1）.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第3期120-124,共5页
Journal of East China Normal University(Natural Science)
基金
国家自然科学基金项目(20575022)
上海市科委项目(0752nm004)
