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中文摘要：
采用高频感应加热熔融拉引法制备Fe73.5Cu1Nb3S13.5B玻璃包裹合金非晶丝，其中金属芯的直径为16-50μm，经570℃退火处理得到具有最佳软磁性能的玻璃包裹纳米晶丝,研究其巨磁阻抗效应，发现随金属芯直径的增大，丝的磁阻抗变化先增大后减小，在30／2m时具有最大磁阻抗变化为251％．
英文摘要：
Amorphous Fe73.5 Cu1Nb3Si13.5B9 microwires were prepared by glass-coated melt spinning technique. Nanocrystalline samples were obtained by annealing the amorphous wires at 570℃, The diameter of the microwires varied between 16 - 50 μm. The relationship between giant magnetoimpedance effect and the metallic core diameter was investigated. The results showed that the GMI ratios first increase then decrease with the increase of metallic core diameter. The highest magnetoimpedance ratio of 251 % is obtained in the nanocrystalline microwire with 30μm in diameter.
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