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Interface characterization of B4C-based multilayers by X-ray grazing-incidence reflectivity and diffuse scattering.
Hui Jiang1, Zhanshan Wang, Jingtao Zhu
1Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangheng Road 239, Pudong District, Shanghai, People's Republic of China. jianghui@sinap.ac.cn
Tungsten/Boron Carbide (W/B4C) multilayers exhibit superior structural stability and sharper interfaces compared to Molybdenum/Boron Carbide (Mo/B4C) and Lanthanum/Boron Carbide (La/B4C) multilayers. This research guides future multilayer fabrication and characterization for X-ray applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Boron Carbide (B4C)-based multilayers are crucial for applications spanning soft to hard X-ray regimes.
- Understanding the structural properties of these multilayers is essential for optimizing their performance.
Purpose of the Study:
- To characterize the structural properties of various B4C-based multilayers.
- To compare the performance and stability of W/B4C, Mo/B4C, and La/B4C multilayers.
- To provide insights for the future development of B4C-based multilayer systems.
Main Methods:
- Utilized X-ray grazing-incidence reflectivity (XRR) and diffuse scattering techniques.
- Employed a combination of analysis methods to determine structural parameters.
- Investigated layer thickness, density, interfacial roughness, interdiffusion, and correlation length.
Main Results:
- W/B4C multilayers demonstrated the sharpest interfaces and most stable structures among the tested samples.
- La/B4C and Mo/B4C multilayers showed weaker roughness replication.
- Aging studies revealed oxidation and structural expansion in La/B4C and Mo/B4C multilayers.
Conclusions:
- W/B4C multilayers are promising candidates for X-ray applications due to their superior structural integrity.
- Mo/B4C and La/B4C multilayers exhibit degradation upon aging, highlighting challenges for long-term stability.
- The findings offer valuable guidance for the precise fabrication and characterization of advanced B4C-based multilayers.
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