Abstract:
The design and discovery of novel functional materials for magnetic, electronic and energy technology applications stimulate much of modern chemistry, physics and materials science. Such functional materials are in particular interests due to their correlated electron systems ground states, and the sensitivity to changes in chemical composition and physical condition. Since these strongly-correlated materials tend to have dense and strongly-bonded structures, extreme pressure and temperature conditions may be particular useful for preparing such materials. High pressure synthesis techniques therefore become one of the most important approaches to stabilize metastable phases for novel materials discovery. For instance, CaMn7O12 crystallizes in perovskite structure and attracted consideration attention recently. It is a type-II multiferroics exhibiting the largest reported magnetoelectric response to date. In order to further investigate the nature of the multiferroicity in AMn7O12 series, solid solution with aliovalent substitution was prepared through high pressure techniques. Recent progress of the project will be delivered in the talk.