Magnetic Resonance of Phase Transitions

Magnetic Resonance of Phase Transitions shows how the effects of phase transitions are manifested in the magnetic resonance data. The book discusses the basic concepts of structural phase and magnetic resonance; various types of magnetic resonances and their underlying principles; and the radiofrequency methods of nuclear magnetic resonance. The text also describes quadrupole methods; the microwave technique of electron spin resonance; and the Mössbauer effect. Phase transitions in various systems such as fluids, liquid crystals, and crystals, including paramagnets and ferroelectrics, are also considered. Physicists and scientists working in energetic materials laboratories will find the book invaluable.

Contenu

Contents
List of Contributors
Preface

1. Basic Concepts of Structural Phase Transitions
   I. Introduction
   II. Macroscopic Theory
   III. Microscopic Theories
   IV. Experimental Approaches
   References
2. Basic Concepts of Magnetic Resonance
   I. Introduction
   II. Fundamentals
   III. Nuclear Magnetic Resonance
   IV. Nuclear Quadrupole Resonance
   V. Electron Spin Resonance
   VI. Mössbauer Resonance
   VII. Relaxation Measurements
   References
3. NMR and NQR in Fluids, Paramagnets,and Crystals
   I. Introduction
   II. Static and Time-Dependent Critical Phenomena
   III. The NMR and NQR Approach
   IV. NMR near the Critical Point in Fluids
   V. NMR in the Paramagnetic Phase and Near the Ordering Temperature
   VI. NMR and NQR near Structural Phase Transitions
   References
4. NMR of Liquid Crystals
   I. Introduction
   II. Motional Averaging
   III. Orientational Order
   IV. Spin-Lattice Relaxation in Thermotropic Liquid Crystals
   Appendix A Spherical Harmonics and Their Transformations
   References
5. Magnetic Resonance Studies of Proton Dynamics in KDP Type Ferroelectrics
   I. Introduction
   II. The Pseudo-Spin Model and the Soft Mode Dynamics
   III. The Polarization Fluctuation Spectrum and the Central Peak
   IV. Condensing Modes
   V. Order Parameter and Shape of the O-H---O Hydrogen Bond Potential
   VI. Short-Range Correlations of Proton Motion
   VII. Fluctuations at Cationic Sites
   VIII. Soft Mode Dynamics
   IX. Central Peak Phenomena
   X. Conclusions
   References
6. EPR of Transition Ions as a Probe of Structural Changes
   I. Introduction
   II. Transition Ions
   III. Nature of Structural Phase Transitions
   IV. Effect of Phase Transitions on EPR Data
   V. Ferroelectrics
   VI. Nonpolar Phase Transitions
   VII. Magnetic Phase Transitions
   VIII. Summary
   References
7. Mössbauer Studies
   I. Introduction
   II. Basics of Mössbauer Spectroscopy
   III. Magnetic Phase Transitions
   IV. Structual Phase Transitions
   V. Metal-Nonmetal Transitions
   VI. High-Spin-Low-Spin Transitions
   VII. Other Phase Transitions
   VIII. Conclusions
   References
   Index