文摘
英文文摘
论文说明:List of Figures
声明
Acknowledgements
Chapter 1 Introduction
1.1 Superconductivity
1.2 Advances of Iron-Based High-Tc Superconductors
1.3 Contributions of M(o)ssbauer Spectroscopy
1.4 Thesis Outline
Chapter 2 Mossbauer Spectroscopy
2.1 The M(o)ssbauer Effect
2.2 Hyperfine Interactions
2.2.1 Isomer Shift
2.2.2 Electric Quadrupole Splitting
2.2.3 Magnetic Hyperfine Splitting
2.2.4 Combined Magnetic and Quadrupole Interactions
2.2.5 Spectrum Line Intensities
Chapter 3 Magnetometry
3.1 Basic magnetic measurements
3.2 SQUID Magnetometry
3.2.1 Electron-pair Waves
3.2.2 Josephson Tunnelling
3.2.3 Superconducting Quantum Interference Device (SQUID)
Chapter 4 Characterization Techniques
4.1 X-Ray Diffractometer
4.2 SQUID Magnetometer
4.3 M(o)ssbauer Spectrometer
4.3.1 gamma-ray Source
4.3.2 Basic M(o)ssbauer Spectrometer
4.3.3 Data Analysis
Chapter 5 1111-type Superconductors
5.1 Sample Preparation
5.2 Results and Discussion
5.2.1 Magnetization Measurements
5.2.2 M(o)ssbauer Spectra Analyses
5.3 Concluding Remarks
Chapter 6 122-type Superconductors
6.1 Sample Preparation
6.2 Results and Discussion
6.2.1 Structural Characterization
6.2.2 Magnetization Measurements
6.2.3 M(o)ssbauer Spectra Analyses
6.3 Concluding Remarks
Chapter 7 My Conclusions
Chapter 8 Appendix:Publications during my PhD program
References