Ultrasound Experiments

Ultrasound is a powerful tool to investigate phase-transitions in solids and liquids. As it is a thermodynamic quantity it can be interpreted simílar as e.g. specific heat, but in addition it yields information on symmetry.

We use

• bulk ultrasound in the frequency range from 1MHz to about 100 MHZ
• Surface Acoustic Waves from 20MHz to 1 GHZ and
  
• low frequeny oscillations from about 1mHz to 1 kHz for internal friction experiments.

Projects

• Determination of elastic moduli of novel materials
• Determination of defect-type and defect-density in novel materials by Internal Friction
  
• Phase transitions related to the metal-insulator transitions in Vanadates
  
• sound induced and sound-modified catalysis
• sound induced motion of magnetic vortices in superconductors