The main research topics in which dr. Ciomaga Cristina Elena has made significant original contributions are: I. Study of BaTiO₃ (BT) solid solutions: preparation – characterization – electrical properties – modeling: (1) Study of  Ba(Zr,Ti)O₃ (BZT) ferroelectric – relaxor ceramics. (2) Implementation of FORC method for describing the local switching properties of BT-solid solutions. II. Study the role of porosity on the functional properties of ceramic materials (BT, BaSrTiO₃ and Nb-doped Pb(Zr,Ti)O₃ (PZT)). III. Multiferroic composites with magnetoelectric coupling: experiment-modelling. (1) Investigation of magnetoelectric effect in Pb(Fe_2/3W_1/3)O₃-PbTiO₃. (2) Study of magnetoelectric properties in BT–(Ni,Zn)Fe₂O₄, PZT-ferrites (CoFe₂O₄, NiFe₂O₄, MnFe₂O₄). IV. The study of composite materials formed by ferroelectric matrix and carbon nanotubes (CNT). V. The study of dielectric relaxation and conduction in ferrites.