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Abstract

The multi-energy composite field micro-electrodeposition processing technology is used to prepare colorful structural coloration magnetic Al ₂O ₃-Co composite films each with a gradual microstructure. Under the action of the deposition electric field and the deflection electric field perpendicular to it, the microstructure, optical properties and magnetic properties of the composite films show gradual characteristics along the direction of the deflection electric field. By establishing an equivalent model of the microstructure, the mechanism of the microstructure change of the composite film is theoretically analyzed. Through software simulation, the distribution of Co ion deposition current density along the direction of the deflection electric field is quantitatively analyzed. The simulation results are consistent with the theoretical and experimental results. Through this study, we find that the micro-electrodeposition processing technology with using multi-energy field composite can control the micro-domain structure of the composite film from a microscopic point of view, and achieve the fine control of the magnetic and optical properties of the film micro-domain.

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Authors and contacts

Corresponding author:Gu Jian-Jun,jjungu@126.com

Funds:Project supported by the Natural Science Foundation of Hebei Province, China (Grant Nos. A2012101001, A2019202190) and the High-level TalentsFunded Projects of Hebei Province, China (Grant No. A2016002040).

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区域		A	B	C
氧化铝模板厚度/nm		290	290	290
氧化铝-Co复合薄膜厚度/nm		305	295	290
结构模型	Co层厚度/nm	15	5	0
	Co纳米线密度/(%)	30	60	100
	孔洞底部Co纳米线长度/nm	160	160	160
	孔洞顶部Co纳米线长度/nm	25	15	0
等效结构模型	Co层等效厚度/nm	14	5	0
	Co纳米线长度/nm	66	102	160
	未填充纳米孔洞长度/nm	225	188	130
	干涉级别	2	1	1
	反射波长/nm	392	632	629
	对应颜色	红紫色	橙黄色	橙红色
平均折射率		n(air-Al₂O₃)=1.55 n(Co)=2.09 n(Co-Al₂O₃)=1.69

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区域	S1	S2	S3	S4	S5	S6	S7	S8	S9	S10
面积/mm²	6.3	11.1	13.5	14.8	15.5	15.5	14.8	13.5	11.1	6.3
粒子数/个	3	11	29	39	38	53	49	84	98	87

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Vol. 71, Issue 1 - 2022-01-05

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