The effect of Fe<sup>3+</sup> on magnetic moment of electrodeposited CoFe alloys—Experimental study and analytical model

The effect of Fe3+ concentration on saturation magnetic flux density (B s) of electrodeposited Co40–44Fe60–56 films was investigated. The results show that if the conditions at the electrochemical interface for nucleation/precipitation of iron(III) hydroxide (Fe(OH)3) are reached, the B s of electrodeposited Co40–44Fe60–56 films quickly decreases as a result of the Fe(OH)3 incorporation into deposit. These conditions are discussed as a function of the solution formulation (pH) and the parameters of electrodeposition process (current density, current efficiency, diffusion layer thickness) and a simple analytical model is developed qualitatively describing the hydroxide incorporation phenomenon and resulting decrease in B s of Co40–44Fe60–56 films.

研究了Fe³⁺浓度对电沉积Co₄₀ - ₄₄Fe₆₀ - ₅₆薄膜饱和磁通密度（Bs）的影响。结果表明，如果达到氢氧化铁（Fe(OH)₃）成核/沉淀的电化学界面条件，由于Fe(OH)₃掺入沉积物中，电沉积Co₄₀ - ₄₄Fe₆₀ - ₅₆薄膜的Bs会迅速降低。这些条件作为溶液配方（pH值）和电沉积工艺参数（电流密度、电流效率、扩散层厚度）的函数进行了讨论，并且定性地建立了一个简单的分析模型，用于描述氢氧化物掺入现象以及由此导致的Co₄₀ - ₄₄Fe₆₀ - ₅₆薄膜Bs的降低。