研究目的
Investigating the optical properties of metallic cerium in the liquid and solid film state to understand its electronic characteristics and their correlation with electrical conductivity.
研究成果
The optical properties of cerium in the solid and liquid states were studied by the ellipsometric method in the spectral range of 0.42–2.60 μm. The spectral dependences of light conductivity σ, reflectivity R, and characteristic loss function Im ε–1 were calculated. The electronic characteristics of a thin polycrystalline film were calculated from the two-band conductivity model, showing that during melting, the concentration of charge carriers decreases slightly, and the ultimate light conductivity also decreases, approaching static conductivity.
研究不足
The study is limited to the spectral range of 0.42–2.6 μm and does not cover other wavelengths that might provide additional insights into the optical and electronic properties of cerium. The high activity of cerium in air necessitated the use of a passivation layer, which might affect the measurements.
1：Experimental Design and Method Selection:
The optical constants of metallic cerium were measured by the ellipsometric Beattie method in the range of
2：42–6 μm at ambient temperature. Thin films of metallic cerium were obtained by vacuum thermal evaporation on a VUP-5M unit from a tungsten evaporator. Sample Selection and Data Sources:
A face of a triangular prism made of optical glass was used as the substrate. The resulting film was covered with a passivation layer of aluminum. X-ray phase analysis shows that cerium in the film corresponds to the γ-phase.
3：List of Experimental Equipment and Materials:
VUP-5M unit for vacuum thermal evaporation, tungsten evaporator, optical glass prism, aluminum for passivation layer.
4：Experimental Procedures and Operational Workflow:
Ellipsometric measurements were made for a ray reflected from the inside of the cerium film, which remained unoxidized. The thickness of the resulting film was ~
5：5 μm. Data Analysis Methods:
Spectral dependences of the reflectivity and the characteristic loss functions were calculated using the obtained optical constants. The electronic characteristics were calculated using the one-band model of nearly free electrons and the two-band conduction model.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
