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PhD. Topics

Institute of Experimental Physics

Topic
Influence of oxygen content on the functionality of RMnO3 materials with perovskite structure
PhD. program
Materials
Name of the supervisor
RNDr. Marián Mihalik, CSc.
Contact:
Receiving school
Faculty of Materials, Metallurgy and Recycling
Annotation
The energy intensity of today's modern society is increasing for several reasons, which are e.g. growth of living standards and population. This demand is partly met by the use of fossil fuels that generate CO2. A possible alternative is more environmentally friendly fuels as hydrogen. Together burning hydrogen is only pure energy and water. Hydrogen storage significantly affects the use of this fuel. In addition to storage in solid state, liquid and in the form of hydrides, classical RMnO3 materials with a perovskite structure belong to one of the known alternatives. In the work “Mihalik Jr. M., Csach K., Kavečanský K., Mihalik M.: Cooperative Jahn-Teller effect in NdMn1-xFexO3+δ (0 ≤ x ≤ 0,2), Journal of Alloys and Compounds, 857 (2021) 157612 „we followed the possibility of creating vacancies in oxygen crystal positions. The topic of the doctoral study is determined to what extent the defective structure created in this way is suitable for hydrogen storage and at the same time to what extent the oxygen content affects the functionality of these materials in terms of magnetic and electrical properties. Successful completion of doctoral studies requires mastering the preparation of some materials in the form of nanopowders, ceramics and crystals, as well as their characterization in terms of structures, magnetic and electrical properties.