Electrodeposition and characterization of Fe sub(80Ga) sub(2)0 alloy films

Due to its high magnetostriction and good mechanical properties Fe sub(80Ga) sub(2)0 is interesting for magnetostrictive microactuators and sensors. Here we use electrodeposition to grow Fe-Ga films onto Au and Pt coated Si substrates by potentiostatic and pulse potential deposition. Composition, mi...

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Bibliographic Details
Published in:Electrochimica acta 2011-05, Vol.56 (14), p.5178-5183
Main Authors: Iselt, D, Gaitzsch, U, Oswald, S, Faehler, S, Schultz, L, Schloerb, H
Format: Article
Language:English
Subjects:
Aqueous electrolytes
Deposition
Electrodeposition
Magnetostriction
Microactuators
Oxygen content
Platinum
Saturation (magnetic)
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Summary:Due to its high magnetostriction and good mechanical properties Fe sub(80Ga) sub(2)0 is interesting for magnetostrictive microactuators and sensors. Here we use electrodeposition to grow Fe-Ga films onto Au and Pt coated Si substrates by potentiostatic and pulse potential deposition. Composition, microstructure and structure are analysed. The desired composition of Fe sub(80Ga) sub(2)0 was obtained at -1.4 V sub(SCE and -1.5 V) sub(S)CE, respectively. The origin of low reproducibility and high oxygen content up to 50 at.% is investigated. Optimum deposition conditions to achieve dense, homogeneous films with low oxygen content are identified. In these films the saturation magnetization reaches a maximum value of 1.7 T confirming the high quality of electrodeposited films. Fe sub(80Ga) sub(2)0 was electrochemically deposited from aqueous electrolyte on Pt buffer layer by choosing suitable deposition parameters and pre-conditions. First published work which present metallic, dense and homogenous FeGa films with oxygen content below 1 at.%. Optimized films reach saturation magnetization values of up to 1.7 T.
ISSN:0013-4686
DOI:10.1016/j.electacta.2011.03.046