NMR Studies in Hexaborides
Diplomarbeit in experimenteller Festkörperphysik


supervised by Prof. Dr. H.-R. Ott and Dr. J. L. Gavilano

• Contents
• Introduction
• NMR Technique
  • Basic Theory
  • Signal Detection
  • The Flow Cryostate
  • The Dilution Cryostate
  • Computer Setup
• Theory
  • The Spin Hamiltonian
    • The Zeeman Interaction
    • The Quadrupolar Interaction
    • The Knight Shift
  • Nuclear Relaxation
    • Magnus Expansion and Relaxation
    • Magnetization Recovery in a System described by more than one Temperature
    • Relaxation Mechanisms
• Results
  • A short Introduction to Hexaborides
  • ¹¹B Spin-Lattice Relaxation
    • Experimental
    • Results
  • Spectra
    • Experimental
    • Results
  • The Spin-Spin Relaxation Rate
  • Discussion
    • Summary
• Thanks
• Computer Installation
  • General Setup
  • SeveNMR
  • The Pulse Programmer Language
  • Data Processing
• SeveNMR
  • Team-Work of the Components
  • The Pulse Masks
  • The Command Line
• Fitting Spectra
  • Simulating Spectra
  • External ProFit Modules
• Additional Figures
  • Top of the Insert of the Flow Cryostate
  • Probe Head of the Flow Cryostate
  • Paramagnetic Impurities
• Bibliography
• About this document ...