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A Study on TM Doped ZnO Diluted Magnetic Semiconductors Synt

發(fā)布時(shí)間:2024-06-14 00:45
  

【文章頁數(shù)】:166 頁

【學(xué)位級別】:博士

【文章目錄】:
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基稀磁半導(dǎo)體的研宄進(jìn)展
    3.制備方法與分析技術(shù)
    4.Fe摻雜ZnO納米晶體中,Fe3+-Vo-Fe3+極化子的鐵磁性耦合
    5.髙脈沖磁場調(diào)控花狀Fe-Ni共摻ZnO晶體的結(jié)構(gòu)和磁性
    6.髙脈沖磁場對Fe-Al共摻ZnO室溫鐵磁性的影響
    7.強(qiáng)脈沖磁場下合成的Cu-Fe共摻ZnO的室溫鐵磁性
    8.總結(jié)與展望



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