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Title: Research and Development of Super Permeability NiFe/Cu Composite Wires for Micro Magnetic Sensors
Keywords: Ferromagnetic; Composite wire; Permalloy; Electrodeposition; Cold drawing; Magnetoimpedance effect
Issue Date: 22-Jul-2008
Citation: SEET HANG LI (2008-07-22). Research and Development of Super Permeability NiFe/Cu Composite Wires for Micro Magnetic Sensors. ScholarBank@NUS Repository.
Abstract: In the development of weak magnetic field sensors such as GMI effect sensors or orthogonal fluxgate sensor, extremely high permeability magnetic materials are essential as sensing elements. Thus, to obtain such magnetic materials, this project focuses on the investigations and optimization of the fabrication process as well as the process parameters in relation to the material, magnetic properties and the sensing performance of the developed sensing elements. The parametric studies were carried out on Ni80Fe20/Cu micro composite wires due to the near-zero magnetostriction and extremely high initial permeability of Ni80Fe20 as well as the high sensing performance arising from high symmetry of the wire structure. The composite wires were developed by chemical electrodeposition, cold drawing and magnetron sputtering. In particular, the nanocrystalline grain size of NiFe layer for electrodeposited composite wires was controlled through the addition of saccharin and the manipulation of the plating current waveform.
Appears in Collections:Ph.D Theses (Open)

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