材料导报
材料導報
재료도보
MATERIALS REVIEW
2010年
2期
53-55
,共3页
电流退火%非晶丝%非晶薄带%巨磁阻抗
電流退火%非晶絲%非晶薄帶%巨磁阻抗
전류퇴화%비정사%비정박대%거자조항
joule annealing%amorphous wire%amorphous ribbon%giant magnetoimpedance
采用熔融抽拉法和单辊急冷法分别制备了Co_(68.25)Fe_(4.5)Si_(12.25)B_(15)非晶丝和薄带.测量了制备态下两者的巨磁阻抗(GMI)效应.发现非晶丝的GMI比率高于薄带.研究了不同电流密度退火后非晶丝和薄带的GMI效应,结果发现△Z/Z=[Z(H)-Z(H=0)]/Z(H=0)都明显上升,且非晶薄带数值更大;当电流密度等于0.96×10~7A/m~2时,薄带的这一比率最大达到410%,磁场灵敏度达到5.1%/(A/m).分析了出现上述现象的原因.
採用鎔融抽拉法和單輥急冷法分彆製備瞭Co_(68.25)Fe_(4.5)Si_(12.25)B_(15)非晶絲和薄帶.測量瞭製備態下兩者的巨磁阻抗(GMI)效應.髮現非晶絲的GMI比率高于薄帶.研究瞭不同電流密度退火後非晶絲和薄帶的GMI效應,結果髮現△Z/Z=[Z(H)-Z(H=0)]/Z(H=0)都明顯上升,且非晶薄帶數值更大;噹電流密度等于0.96×10~7A/m~2時,薄帶的這一比率最大達到410%,磁場靈敏度達到5.1%/(A/m).分析瞭齣現上述現象的原因.
채용용융추랍법화단곤급랭법분별제비료Co_(68.25)Fe_(4.5)Si_(12.25)B_(15)비정사화박대.측량료제비태하량자적거자조항(GMI)효응.발현비정사적GMI비솔고우박대.연구료불동전류밀도퇴화후비정사화박대적GMI효응,결과발현△Z/Z=[Z(H)-Z(H=0)]/Z(H=0)도명현상승,차비정박대수치경대;당전류밀도등우0.96×10~7A/m~2시,박대적저일비솔최대체도410%,자장령민도체도5.1%/(A/m).분석료출현상술현상적원인.
Co_(68.25)Fe_(4.5)Si_(12.25)B_(15) amorphous wires and ribbons are produced by melt-extraction method and single roller melt spinning method,respectively.After measuring the GMI effect of them in as-quenched state,it is found that the GMI ratio of wire is higher than that of ribbon.The relationship between GMI effect and the density of annealing current is investigated,and as a result,the ratios,△Z=[Z(H)-Z(H=0)]/Z(H=0),of both wires and ribbons rise obviously and the values of amorphous ribbons are higher.When the current density is 0.96×10~7 A/m~2,this maximal GMI ratio of ribbon can reach about 410%,the sensitivity of magnetic field achieves 5.1%/(A/m).The possible reason for these phenomena is discussed.
