Herbert Jaeger

Herbert Jaeger

Professor & Department Chair

Office: 217 Kreger Hall


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 primary research interest is 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.
I use time-differential perturbed angular correlation spectroscopy (PAC) and positron annihilation lifetime spectroscopy (PALS) 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. PALS determines defect signatures and concentrations based on how long positrons exist before they annihilate with electrons. These techniques allow 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.

Through my teaching of “Physics for Music” (PHY 131) I became interested in physical acoustics and am developing sensors and techniques to measure properties of simple systems as well as musical instruments.