Working groups of department 12

We focus on study of dielectric and vibration spectra of ferroelectrics in the form of single crystals, ceramics, thin films and multilayers in a very broad spectral and temperature range (1 mHz – 150 THz, 5 – 950 K).

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Equipment

• Dielectric analyzer Alpha_AN (Novocontrol), frequency range 3x10^-6Hz–20 MHz, 10–900K
  (contact: M. Savinov, ext. 2641, room

The group concentrates on investigation of lattice dynamics and critical phenomena in polar materials, like ferroelectrics and relaxor ferroelectrics. These materials are known for their extraordinary dielectric and electromechanical properties, widely used in industrial applications ranging from micro-capacitors and ferroelectric memories to transducers and actuators.

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Experimental

We investigate materials with globally or locally broken center of inversion, such as piezoelectric, ferroelectric, antiferroelectric, relaxor or incommensurate dielectrics in form of crystals, ceramics, films as well as complex nanostructures. The team focuses on developing preparation methods, by characterization of structural phase transitions by calorimetric, structural and nonlinear optic methods, and by theoretical modeling of their physical properties.