Preparation and Properties of Amorphous NiFe/Cu/NiFe Thin Films
来源期刊：材料保护2004年增刊第2期
论文作者：JIANG Ya-dong YE Yun ZENG Hong-juan HU Wen-cheng
关键词：electroplating; permalloy; amorphous; GMI effect;
摘 要：The amorphous of Permalloy on the copper subtract was studied using composite electroplating method. A portion of hydrogen brings the counteraction on the surface of cathode leading nickel-iron alloys to be anomalous in the process of co-depositing. The results of X-ray diffraction (XRD) show that the Ni-Fe alloys layer is amorphous. The Giant Magneto -Impedance (GMI) effect of Ni-Fe alloys was obtained under the optimal conditions, dependence on the soft magnetic property of Ni-Fe amorphous thin film. As a result, the ratios△ Z/Z of NiFe/Cu/NiFe amorphous thin film are 30% at 40 kHz which is in low frequency. Furthermore, the GMI value of NiFe/Cu/NiFe amorphous thin film with a sandwich structure is higher than that of single-layer ferromagnetic films of the same thickness.
JIANG Ya-dong1，YE Yun1，ZENG Hong-juan1，HU Wen-cheng2
(1.School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054;
2.School of Microelectronics and Solidstate Electronics, University of ElectronicScience and Technology of China, Chengdu 610054, China)
摘要:The amorphous of Permalloy on the copper subtract was studied using composite electroplating method. A portion of hydrogen brings the counteraction on the surface of cathode leading nickel-iron alloys to be anomalous in the process of co-depositing. The results of X-ray diffraction (XRD) show that the Ni-Fe alloys layer is amorphous. The Giant Magneto -Impedance (GMI) effect of Ni-Fe alloys was obtained under the optimal conditions, dependence on the soft magnetic property of Ni-Fe amorphous thin film. As a result, the ratios△ Z/Z of NiFe/Cu/NiFe amorphous thin film are 30% at 40 kHz which is in low frequency. Furthermore, the GMI value of NiFe/Cu/NiFe amorphous thin film with a sandwich structure is higher than that of single-layer ferromagnetic films of the same thickness.
关键词:electroplating; permalloy; amorphous; GMI effect;
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