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摘要: 用化学镀方法在铜丝上镀NiFeP薄膜,采用电流退火的方法对复合结构丝进行热处理.电流退火使薄膜感生圆周磁各向异性,从而使样品磁阻抗效应有明显提高.退火电流及时间有一个最佳值,当退火电流为2.8 A,退火时间为2 min时,样品在475 kHz时的磁阻抗效应为53.2%.Abstract: NiFeP/CuBe composite wires were produced by electroless-deposition, then were annealed using a DC Joule annealing technique for certain time in the environment of nitrogen gas. The experiments showed that DC Joule annealing may induce circular anisotropy in the ferromagnetic layer, thus the GMI effect of the composite wires is increased greatly. When the annealing current is 2.8 A and the annealing time is 2 minutes, the sample’s GMI effect reaches the highest value of 53.2% at 475 kHz.
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Key words:
- GMIeletroless-depositionNiFePDC Joule annealing /
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