Co基非晶丝退火处理及巨磁阻抗效应

钢铁研究学报, 2010, 22(7): 38-41.

Co基非晶丝退火处理及巨磁阻抗效应

张树玲 ^1, , 邢大伟 ^2, , 王欢 ^3, , 孙剑飞 ^4,

1.哈尔滨工业大学材料科学与工程学院,哈尔滨150001,黑龙江

2.哈尔滨工业大学材料科学与工程学院,哈尔滨150001,黑龙江

3.哈尔滨工业大学材料科学与工程学院,哈尔滨150001,黑龙江

4.哈尔滨工业大学材料科学与工程学院,哈尔滨150001,黑龙江

关键词：退火 , GMI效应 , 非晶丝 , 各向异性场

Annealing Treatment and Giant Magneto Impedance of Co-Based Amorphous Wires

采用熔体抽拉法制备了直径59μm的Co68.25Fe4.5Si12.25B15非晶丝,在400、500℃进行了不同工艺的退火处理,分析了退火处理对Co基丝磁阻抗(GMI)效应的影响.结果表明,400℃退火处理降低了丝的各向异性场,提高GMI效应和双峰出现频率,并大幅提高了磁场响应灵敏度.400℃保温20min退火样品双峰出现频率提高至13 MHz.400℃保温80min退火样品低频GMI效应最强,最大阻抗变化率ΔZ/Z达到468.6%,5 MHz时磁场响应灵敏度为0.73%(m/A).500℃退火,由于晶化相析出导致软磁性能和GMI效应的降低,双峰出现频率降至3MHz.试验表明退火处理可以有效提高材料的灵敏度,获得适合磁传感器应用的磁敏丝材.

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材料期刊网

Co基非晶丝退火处理及巨磁阻抗效应

Annealing Treatment and Giant Magneto Impedance of Co-Based Amorphous Wires

参考文献