Herbert Jaeger

Herbert Jaeger

Professor & Department Chair

217 Kreger Hall
513-529-5515

jaegerh@MiamiOH.edu

  • MS Electrical Engineering, University of Applied Sciences Darmstadt, Germany 1977
  • Voridiplom Physics, University of Tübingen, Germany 1979
  • MS Physics, Oregon State University 1983
  • PhD  Physics, Oregon State University 1986
  • Joined Miami faculty in 1992

My expertise is in materials physics, in particular, the physics of ceramic materials. Ceramics belong to a huge class of materials that includes a multitude of compounds, many of which have technologically important applications, such as thermal barrier coatings, oxygen sensors, ferroelectric memory chips, and high transition temperature superconductor devices.

For many years I used time-differential perturbed angular correlation spectroscopy (PAC) to study structure and defects in ceramic materials on a microscopic level. PAC is a hyperfine interaction method and uses a nuclear probe to measure its interaction with electric and magnetic fields due to surrounding charges and spins. PAC allows the characterization of crystalline order, the study of local defect structures, as well as the investigation of structural and dynamic processes, such as phase transitions, the nature of defects, vacancy migration, etc.

I no longer do PAC research and more recently switched my attention to the field of physical acoustics, something in which I became interested through my teaching of “Physics for Music” (PHY 131).  I am working on the measurement of acoustic impedance of simple air columns as well as musical instruments.  In addition, I am developing computational approaches to calculate the acoustic impedance of arbitrary air columns.