磁性材料及器件
磁性材料及器件
자성재료급기건
JOURNAL OF MAGNETIC MATERIALS AND DEVICES
2010年
1期
24-26,31
,共4页
CoFeSiB非晶丝%CoFeSiB非晶薄带%张应力%巨磁阻抗
CoFeSiB非晶絲%CoFeSiB非晶薄帶%張應力%巨磁阻抗
CoFeSiB비정사%CoFeSiB비정박대%장응력%거자조항
CoFeSiB amorphous wire%CoFeSiB amorphous ribbon%tensile stress%giant magneto impedance
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.研究了不同张应力作用下丝和薄带的GMI效应,结果发现随张应力的上升非晶丝的GMI比下降,而非晶薄带的GMI比则先升后降.当张应力为227MPa时,薄带的GMI比最大达到452%,△Z/Z=[Z(H)-Z(H=0)]/Z(H=0)也达到260%,磁场灵敏度达到3.2%/(A·m~(-1)).分析表明过强的环向(横向)各向异性反而不利于GMI效应.
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.研究瞭不同張應力作用下絲和薄帶的GMI效應,結果髮現隨張應力的上升非晶絲的GMI比下降,而非晶薄帶的GMI比則先升後降.噹張應力為227MPa時,薄帶的GMI比最大達到452%,△Z/Z=[Z(H)-Z(H=0)]/Z(H=0)也達到260%,磁場靈敏度達到3.2%/(A·m~(-1)).分析錶明過彊的環嚮(橫嚮)各嚮異性反而不利于GMI效應.
채용용융추랍법화단곤급랭법분별제비료Co_(68.25)Fe_(4.5)Si_(12.25)B_(15)비정사화박대.연구료불동장응력작용하사화박대적GMI효응,결과발현수장응력적상승비정사적GMI비하강,이비정박대적GMI비칙선승후강.당장응력위227MPa시,박대적GMI비최대체도452%,△Z/Z=[Z(H)-Z(H=0)]/Z(H=0)야체도260%,자장령민도체도3.2%/(A·m~(-1)).분석표명과강적배향(횡향)각향이성반이불리우GMI효응.
Co_68.25Fe_(4.5)Si_(12.25)B_(15) amorphous wires and ribbons were produced by melt-extraction method and single roller melt spinning method, respectively. The relationship between GMI effect and tensile stress was investigated, and as a result, with the increase of tensile stress the GMI ratio of wires decreases while that of ribbons first increases and then decreases. When the tensile stress was equal to 227MPa, the maximal GMI ratio of ribbon reaches 452% and the ratio △Z/Z=[Z(H)-Z(H=0)]/Z(H=0) reaches 260%, the sensitivity of magnetic field achieves 3.2%/(A·m~-1). Analysis showed that excessively strong anisotropy in circumferential or transverse direction was not conducive to GMI.
