使用较低的快淬速度(V=22 m*s-1), 可以使Fe-Cu-Nb-Si-B 薄带实现淬态纳米晶化.Fe-Cu-Nb-Si-B薄带析出α-Fe(Si) 纳米相, 其晶粒尺寸在淬态薄带Fe73Cu1.5Nb3Si13.5B9中约为15 nm, 在Fe71.5Cu3Nb3Si13.5B9中约为10 nm.添加Cu元素可以细化淬态薄带的晶粒.实验发现磁阻抗ΔZ/Z0, 磁电阻ΔR/R0, 磁电抗ΔX/X0 三条曲线交叉于一点, 通过推导发现此现象具有必然性.淬态薄带Fe74.5-xCuxNb3Si13.5B9的磁阻抗显示了较强的Cu含量依赖性.在快淬速度v=22 m*s-1下,在 x=1.5 和x=3左右观察到磁阻抗峰值现象.
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