Soft phonon mode spectroscopy of ferroelectrics, incipient ferroelectrics and relaxor ferroelectrics by using infrared, terahertz and microwave dielectric spectroscopy of crystals, ceramics and thin films.

Broad-band dielectric spectroscopy of relaxor ferroelectrics.

Study of spin-phonon coupling, magnons and electromagnons in multiferroics using microwave, terahertz and infrared spectroscopy.

Magnetoelectric and magnetodielectric coupling in multiferroics.

Continuous microwave measurements of magnetic permeability and dielectric permittivity.

Broad-band dielectric spectroscopy of composites and materials with inhomogeneous conductivity.

Modelling of the dielectric response of composites and ceramics with anisotropic grains by using various effective medium models.

Percolation in the dielectric and conductivity response of composites with conducting components.

Giant permittivity phenomena, particularly due to inhomogeneous conductivity in weakly conducting materials, Maxwell-Wagner effects.