Title :
Giant magnetoimpedance effect in CuBe/NiFeB and CuBe/insulator/NiFeB electroless-deposited composite wires
Author :
Wang, Xinzheng ; Yuan, Wangzhi ; Zhao, Zhenjie ; Li, Xiaodong ; Ruan, Jianzhong ; Yang, Xielong
Author_Institution :
Dept. of Phys., East China Normal Univ., Shanghai, China
Abstract :
The giant magnetoimpedance (GMI) effect of CuBe/NiFeB and CuBe/insulator/NiFeB composite wires prepared by electroless-deposition was investigated. The results showed that geometry dimension has a significant influence on the GMI effect of CuBe/NiFeB composite wire. As the NiFeB layer thickness approaches the skin depth of the NiFeB layer, maximum GMI will be expected; it reaches -23% at 1 MHz. After adding an insulator layer, the GMI ratios of CuBe/insulator/NiFeB composite wire were much higher than those of CuBe/NiFeB composite wire. The maximum GMI ratio of CuBe/insulator/NiFeB composite wire was 250% at 500 kHz-1 MHz. This result is related to current redistribution under the external magnetic field and the electromagnetic interaction between the conductive core and the ferromagnetic layer, and also is related to the skin effect and eddy current of the sample.
Keywords :
MIM structures; beryllium alloys; boron alloys; composite materials; copper alloys; eddy currents; electroless deposition; giant magnetoresistance; iron alloys; magnetic thin films; nickel alloys; skin effect; 0.5 to 1 MHz; CuBe-NiFeB; conductive core; current redistribution; eddy current; electroless-deposited composite wires; electroless-deposition; electromagnetic interaction; external magnetic field; ferromagnetic layer; geometry dimension; giant magnetoimpedance effect; insulator layer; skin depth; skin effect; Cable insulation; Eddy currents; Frequency; Magnetic cores; Magnetic films; Magnetic materials; Magnetic separation; Skin effect; Soft magnetic materials; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.832479
