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Soft Magnetic Properties of Electrodeposited Fe-Ni Films Prepared in Citric Acid Based Bath


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Title: Soft Magnetic Properties of Electrodeposited Fe-Ni Films Prepared in Citric Acid Based Bath
Authors: Shimokawa, Takaya / Yanai, Takeshi / Takahashi, Kenichiro / Nakano, Masaki / Suzuki, Kiyonori / Fukunaga, Hirotoshi
Issue Date: Nov-2012
Publisher: Institute of Electrical and Electronics Engineers Inc.
Citation: IEEE Transactions on Magnetics, 48(11), pp.2907-2909; 2012
Abstract: Electrodeposited Fe-Ni films are widely used in device applications. However, there is a growing awareness of the toxicity of the plating bath containing boric acid. In order to avoid boric acid in the deposition process, we have employed a citric acid based bath for electrodeposition of Fe-Ni films and investigated the effect of the acid content in the bath on the structural and magnetic properties of the deposited films. It is found that the Fe content of the film depends largely on the acid concentration and low coercivity values of less than 30 A/m are realized when the Fe content of the film is around 22 at.%. This magnetic softness is attainable in a wide film thickness range between 20 and 120 μm. Our process exhibits a relatively high cathode efficiency of above 55%. Furthermore, a high deposition rate of 170 μm is obtained without sacrificing the magnetic softness of the film by increasing the current density during the deposition. From these results, we conclude that the citric acid based bath is an environmentally friendlier plating bath ideal for mass-production of magnetically soft Fe-Ni films.
Keywords: Electrodepositon / Film / Permalloy / Soft magnetic material
URI: http://hdl.handle.net/10069/34644
ISSN: 00189464
DOI: 10.1109/TMAG.2012.2203295
Rights: © 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/34644

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