物理学报2011，Vol.60Issue(12)：539-544,6.
FeCo基磁芯螺线管巨磁阻抗效应与磁芯长度关系的研究
Investigation on the relation between the length of magnetic core and the giant magnetoimpedance effect of solenoid with FeCo-based magnetic core
摘要
Abstract
The relation between the length of the magnetic core （l） and the giant magnetoimpedance（GMI） effect of solenoid with magnetic core of Fe36 Co36 Nb4Si4.8 B19.2 ribbon which annealed with current 32 A/mm2 for 10 min,has been investigated.The result shows that there is a sensitive relation between l and GMI.There is a linear relation between the l and the maximum of the GMI （ΔZ/Z）max when l is smaller than the length of the solenoid l0.The linear correlation coefficient can be deduced from the electromagnetism theory.It should deviate from the linear relation when l is greater than l0.There is a maximum value of the （ΔZ/Z）max when the l reaches the best value.There is a similar relation between the height of the tip like part of the GMI profile （ΔZ/Z）T and l.There is a maximum value of the （ΔZ/Z）T when the l is the best value.The tip like part of the GMI profile,which responds to the weak magnetic field sensitively,is influenced by the demagnetizing field.There is a negative exponential relation between the demagnetizing field and the length of the magnetic core l.关键词
磁芯螺线管/FeCo基合金薄带/巨磁阻抗效应/磁芯长度Key words
solenoid with magnetic core/FeCo-based ribbon/giant magnetoimpedance effect/length of magnetic core分类
数理科学引用本文复制引用
方允樟,许启明,郑金菊,吕葆华,潘日敏,叶慧群,郑建龙,范晓珍..FeCo基磁芯螺线管巨磁阻抗效应与磁芯长度关系的研究[J].物理学报,2011,60(12):539-544,6.基金项目
国家自然科学基金 （）
浙江省自然科学基金 （）
陕西省自然科学基金（批准号：SJ08E101）资助的课题 （）
