The CaCu3Ti4O12 thin films were prepared from the nitrate-alkoxide based solutions. The films, prepared by rapid annealing at 750 oC of the as-deposited layers consisted of equiaxed grains of a few 10 nm. By introducing a nucleation layer, the microstructure with columnar grains of a few 100 nm across was obtained. The RT value of dielectric permittivity of the granular films was about 1100 at 1 kHz, more than five times larger than that of the columnar films. The temperature dependence of dielectric permittivity of the films could be tailored by post-annealing in different atmospheres.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 23776295Ceramic thin films with high dielectric permittivity have been studied for different microelectronic applications, including for example thin film capacitors, sensors or actuators, or tunable microwave devices. Due to environmental concerns, lead-free materials represent an alternative to complex lead-based perovskites, mainly for piezoelectric or ferroelectric applications. The contribution addressed thin films based on selected compositions within the alkaline tantalate/niobate, and on alkaline earth titanate systems, prepared by Chemical Solution Deposition routes.
B.04 Guest lecture
COBISS.SI-ID: 22362663In the frame of the postgraduate study of electronics aeries of lectures Processing of electronic ceramics: from bulk to nanoparticles was perofrmed at the University of Oulu, Infotech Graduate School, 9 – 14 October 2009. The topics included powder processing, processing of bulk ceramics. chemical solution deposition (CDS) of thin films and synthesis of (nano)particles.
B.05 Guest lecturer at an institute/university
COBISS.SI-ID: 23204903B. Malič obtained important scientific results in the field of synthesis of environment friendly lead-free piezoelectrics, chemical solution deposition of ferroelectric thin films and solution synthesis of nanoparticles in published them in a number of papers. The paper from 2005, has been among the top 10 cited articles published in Journal of the European Ceramic Society in the (2005-2010) period.
E.01 National awards
COBISS.SI-ID: 19093031In the EU 6FP project CAMELIA we studied thin film capacitiors with high values of permittivity. We found that the dielectric permittivity of CaCu3Ti4O12 thin films prepared by chemical solution deposition was strongly dependent on the film microstruture. We determined the frequency and temperature dependence of dielectric permittivity and losses of the films with fine granular and with columnar microstructures.
D.06 Final report on a foreign/international project
COBISS.SI-ID: 23622439