A Study on TM Doped ZnO Diluted Magnetic Semiconductors Synt

发布时间：2024-06-14 00:45

　　

【文章页数】：166 页

【学位级别】：博士

【文章目录】：
ABSTRACT
英文部分
    Chapter 1: Introduction
        1.1 Diluted Magnetic Semiconductors (DMSs)
        1.2 ZnO based DMS
        1.3 Theoretical model for ferromagnetism in TM doped ZnO
            1.3.1 Ruderman-Kittel-Kasuya-Yosida (RKKY) Theory
            1.3.2 Mean-Field Zener Theory
            1.3.3 Double Exchange Theory
            1.3.4 Bound Magnetic Polarons (BMP) Theory
    Chapter 2: Research Progress in ZnO based DMS System
        2.1 Single Transition element (TM)-doped ZnO
            2.1.1 Mn-doped ZnO
            2.1.2 Co-doped ZnO
            2.1.3 Fe-doped ZnO
            2.1.4 Cr-and Ni-doped ZnO
        2.2 co-doped ZnO
        2.3 Effect of the high pulsed magnetic field in materials preparation
        2.4 Objective and significance of the research
        2.5 Research contents
    Chapter 3: Experimental Procedure
        3.1 Hydrothermal method
            3.1.1 Sample preparation
        3.2 Characterization
            3.2.1 X-ray Diffraction (XRD)
            3.2.2 Scanning Electron Microscopy (SEM) and EDX Spectroscopy
            3.2.3 X-ray Photoelectron spectroscopy (XPS)
            3.2.4 Raman Spectroscopy
            3.2.5 Photoluminescence spectroscopy (PL)
            3.2.6 Vibrating Sample Magnetometer (VSM)
    Chapter 4: Ferromagnetic Coupling of Fe³⁺-VO-Fe³⁺ Polarons in Fe-doped ZnO
        Specimen preparation
        4.1 Structural characterization
            4.1.1 XRD results
            4.1.2 Raman scattering spectra analysis
        4.2 Morphology and chemical composition
        4.3 Valence state studies
        4.4 Optical properties
        4.5 Magnetic properties
        4.6 Summary
    Chapter 5: Magnetic Property of Fe and Ni co-doped ZnO Flowers
        Specimen preparation
        5.1 Structural characterization
            5.1.1 Phase composition
            5.1.2 Raman scattering spectra
        5.2. Morphology and chemical composition
        5.3 Local structure of dopants and defects
        5.4 Magnetic properties
        5.5 Summary
    Chapter 6: Microstructure and Magnetic Property of Fe and Al co-doped ZnONanoparticles
        Specimen preparation
        6.1 Structure analysis
            6.1.1 XRD results
            6.1.2 Raman analysis
        6.2 SEM and TEM analysis
        6.3 XPS analysis
        6.4 Diffuse Reflectance Spectroscopy analysis
        6.5 Magnetic properties
        6.6 Summary
    Chapter 7: Room Temperature Ferromagnetic Property of Cu, Fe co-doped ZnO
        Specimen preparation
        7.1 Structural characterization
            7.1.1 Phase composition
            7.1.2 Raman analysis
        7.2 XPS analysis
        7.3 Magnetic properties
        7.4 Summary
    Chapter 8: Conclusion and Future work
        8.1 Conclusion
        8.2 Future work
References
Publication List
Acknowledgments
中文部分
    l.研究背景
    2.ZnO基稀磁半导体的研宄进展
    3.制备方法与分析技术
    4.Fe掺杂ZnO纳米晶体中,Fe³⁺-Vo-Fe³⁺极化子的铁磁性耦合
    5.髙脉冲磁场调控花状Fe-Ni共掺ZnO晶体的结构和磁性
    6.髙脉冲磁场对Fe-Al共掺ZnO室温铁磁性的影响
    7.强脉冲磁场下合成的Cu-Fe共掺ZnO的室温铁磁性
    8.总结与展望



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