Dissertation
Dissertation > Mathematical sciences and chemical > Physics > Solid State Physics > Thin Film Physics > Film growth,structure and epitaxy

Electrochemical preparation of aqueous solution in the Sm-Co films

Author ZhangJinFang
Tutor GuoGuangHua
School Central South University
Course Condensed Matter Physics
Keywords Aqueous solution Complexing agent Cyclic voltammetry curves Potentiostatic electrodeposition Sm-Co film Characterization
CLC O484.1
Type Master's thesis
Year 2011
Downloads 11
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Sm-Co alloy thin film having a high Curie temperature, a high coercive force and high saturation magnetization and excellent magnetic properties, and has a good prospect in the field of high-density magnetic recording media, electronic devices, micro-electromechanical systems (MEMS). This paper discusses the electrochemical behavior of Sm3 ions and Co2 ions in the chloride type Sulphamate electrolyte system, both electrolyte at room temperature by the constant potential method electrodeposition prepared Sm-Co alloy films. Specific work as follows: 1. Study the co-deposition of the the Sm3 ions and Co2 ions in chloride electrolyte. Sm3 ions and CO2 ions in the system to achieve the induction of co-deposited from the cyclic voltammogram and the deposited film of the EDS detection. Application of the the potentiostat law, preparation of the Sm-Co film on Cu substrate from chlorides type electrolyte. To utilize SEM.EDS and XRD to characterize the film morphology, composition and structure. The results show that the film was a silver-gray, dense structure, uniformity; film by Sm and Co, and a small amount of impurity elements; film amorphous. And to study the the deposition potential impact of the Sm-Co film composition and morphology. The results show that, along with the the deposition potential negative shift, the Sm content first increased and then decreased; film morphology gradually deteriorate. 2. Deposition of the the Sm3 ion and Co2 ions in Sulphamate electrolyte, Total. Sm3 ions and CO2 ions in the system to achieve the induction of co-deposited from the cyclic voltammogram and the deposited film of the EDS detection. Sulfamate electrolyte, the use of constant potential technology out of the Sm-Co thin films were prepared on different substrates. SEM, EDS and XRD characterization description of the film was silver-gray, dense structure; film by Sm and Co, and a small amount of impurity elements; film is amorphous; compared to chloride-type electrolyte, sulfamate electrolyte more conducive to improving rare earth Sm content in the film. And to study the the deposition potential impact of the Sm-Co film composition and morphology. The results show that, with the deposition potential negative shift in the low potential region, Sm content showed an increasing trend; relatively Cu substrate, glass and silicon film morphology. 3. Study of heat treatment on the impact of the structure, morphology and magnetic properties of the Sm-Co film (Si wafer substrate). The results show that after the heat treatment, the film was crystalline; structure is more compact and has a grain precipitation; magnetic films exhibit significantly enhanced.

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