Our group is mainly interested in using optical and Raman spectroscopy to investigated vibrational properties and electrodynamics of strongly correlated, multiferroic materials.
Materials combining different ferroic properties have recently attracted a lot of attention because of their puzzling physics and potential novel applications. Indeed, in these few systems, both ferroelectric and magnetic orderings are coupled. Hexagonal manganites RMnO3 (R is a rare earth) belong to this class of materials. When the ionic radius of R is small enough (R=Ho, Er, Tm, Yb, Lu, Y, and Sc) , rare-earth manganites RMnO3 crystallize in hexagonal structure with space group P63cm. These compounds become ferroelectric below 590–1000 K and strongly frustrated antiferromagnets below 100 K.