Influence of a thermal annealing procedure on kesterites Kesterite is a mineral with a formular Cu2ZnSn(S,Se)4. It is a very promising material for future photovoltaics (PV), since the composition is non-toxic and the source materials are very cheap in relevance to other PV-materials.Read More →
An international team has examined pristine and slightly doped bismuth ferrite using experimental data obtained at HZB. The research shows the sequence of serial and trigger-type phase transitions, the temperature-dependent behavior of the order parameters, and the corresponding susceptibilities to external stimuli. The material: Multiferroics are materials that exhibit multiple types of ferroic ordering, such as ferromagnetism and ferroelectricity, simultaneously. BiFeO3 (BFO) is the one of the rare multiferroics with a strong ferroelectric polarization, antiferromagnetism at room temperature as well as conduction and magnetotransport at domain walls. This makes it a candidate for a range of applications. The question: What are the underlying physical mechanismsRead More →