TY - JOUR
T1 - Controlled electrochemical deposition of magnetostrictive Fe 1 - XGa x alloys
AU - Reddy, K. Sai Madhukar
AU - Estrine, Eliot C.
AU - Lim, Dong Ha
AU - Smyrl, William H.
AU - Stadler, Bethanie J.H.
PY - 2012/5/8
Y1 - 2012/5/8
N2 - In this study, using steady-state electrochemistry at a rotating disk electrode, a deposition mechanism for giant magnetostrictive Fe 1 - xGa x alloys is proposed in which the formation of an adsorbed monovalent [Fe(I)] ads intermediate is determined to be the rate-determining step. In subsequent steps, this intermediate either gets reduced to iron or catalyzes the reduction of gallium by forming an adsorbed [Ga(III)-Fe(I)] ads intermediate. In line with the proposed mechanism, it was experimentally shown that the differences in the mass-transport rates of Fe(II) species determined the thin film composition. Therefore, this study has made possible a controllable and reproducible deposition of Fe 1 - xGa x thin films with compositions in the entire range of interest (15%-30% Ga). As-grown Fe 80Ga 20 thin films were found to have magnetostriction constants of ~ 112 ppm.
AB - In this study, using steady-state electrochemistry at a rotating disk electrode, a deposition mechanism for giant magnetostrictive Fe 1 - xGa x alloys is proposed in which the formation of an adsorbed monovalent [Fe(I)] ads intermediate is determined to be the rate-determining step. In subsequent steps, this intermediate either gets reduced to iron or catalyzes the reduction of gallium by forming an adsorbed [Ga(III)-Fe(I)] ads intermediate. In line with the proposed mechanism, it was experimentally shown that the differences in the mass-transport rates of Fe(II) species determined the thin film composition. Therefore, this study has made possible a controllable and reproducible deposition of Fe 1 - xGa x thin films with compositions in the entire range of interest (15%-30% Ga). As-grown Fe 80Ga 20 thin films were found to have magnetostriction constants of ~ 112 ppm.
KW - Deposition mechanism
KW - Galfenol
KW - Gallium
KW - Giant magnetostrictive alloy
KW - Iron
KW - Rotating disk electrode
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U2 - 10.1016/j.elecom.2012.02.039
DO - 10.1016/j.elecom.2012.02.039
M3 - Article
AN - SCOPUS:84860540012
VL - 18
SP - 127
EP - 130
JO - Electrochemistry Communications
JF - Electrochemistry Communications
SN - 1388-2481
IS - 1
ER -