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Large magnetic permeability and resonant frequency of CoFe nanofilms electrodeposited via optimizing plating solution parameters based on electrochemistry mechanisms

Published online by Cambridge University Press:  22 May 2014

BaoYu Zong ,
YuPing Wu ,
Nguyen Nguyen Phuoc ,
Pin Ho  and
FuSheng Ma
BaoYu Zong*
Affiliation:
Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, Singapore 117411. tslzb@nus.edu.sg.
YuPing Wu
Affiliation:
Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, Singapore 117411. tslzb@nus.edu.sg.
Nguyen Nguyen Phuoc
Affiliation:
Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, Singapore 117411. tslzb@nus.edu.sg.
Pin Ho
Affiliation:
Department of Materials Science and Engineering, National University of Singapore, Singapore 117576.
FuSheng Ma*
Affiliation:
Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, Singapore 117411. tslzb@nus.edu.sg.
*
*Email: tslzb@nus.edu.sg
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Abstract

A simple methodology to electrodeposit thin soft CoFe films with desirable microwave properties from simple salt solutions at room temperature is demonstrated. Plating solution parameters have diverse influences on real potentials of ion reductions and deposition behavior of the FeCo crystals, consequently affecting largely the particle size, crystal structure and chemical composition of the film fabricated. This in turn determines their static magnetism and dynamic microwave properties. Through optimizing solution additive, concentration and temperature from electrodeposition mechanism, the as-prepared nanofilms possess a low coercivity of < 30 Oe, moderate anisotropy of 60-90 Oe, high crystallinity and magnetic moment of ≥ 2.0 T, and hence readily display an ultrahigh magnetic permeability (up to 1128) and resonant frequency (up to 2.1 gigahertz) simultaneously, as well as other desirable physico-chemical properties. Thus the nanofilms can be applied to high gigahertz frequency applications.

Keywords

magnetic propertieselectrodepositionthin film
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1708: Symposium VV – Modeling and Theory-Driven Design of Soft Materials , 2014 , mrss14-1708-vv02-08
Copyright
Copyright © Materials Research Society 2014 

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References

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