Research topic: Ferroika
Oxides are the classical preference of the working group. Especially, ferroelectrics and their electrical behavior are part of the fundamental expertise at the institute. The fatigue mechanisms as well as the production of nanoparticles up to ceramics of these perovskites play a major role.
Ferroelectrics form the basis for the ceramic capacitors that we use in all electronic devices. They are also vital materials for piezoelectrics, enabling ultrasound, smart materials, echo sounders, non-destructive testing, non-linear optics, filters in cell phones, etc. In our institute relaxor ferroelectrics are studied in detail. Their complex inner structure (the photo shows the beautiful inner forms of the ceramic structure) allows maximum material coefficients. In addition, the additional complexity of multiferroics has been studied. Within the framework of the DFG Research Group 1509, composites have been investigated which couple electrical and magnetic storage properties and thus enable potentially excellent computer memories with very low energy consumption. Recently, intrinsic multiferroics, especially bismuth ferrite, which is famous for its properties at room temperature, has also gained interest.
A special feature of the methodology is atomic force microscopy, which allows the investigation of the functional properties on material surfaces on the nanometer scale.