V’NCS, September 25–27, 2014, Sofia, Bulgaria
Interfaces in ferroic and non-ferroic systems U. Bismayer* Fachbereich Geowissenschaften, Universität Hamburg, Grindelallee 48, 20146 Hamburg, Germany
Interfaces like twin boundaries or wall regions between amorphous and crystalline material are microstructures which occur in natural and synthetic solids on the nanoscale. Among such nanostructures are ferroic twin walls which develop as a consequence of phase transitions and crossed lamellar interfaces in bio-minerals. Individual interfaces can vary from thin walls extended over a few unit cells up to several thousand nm. Interfaces show distinct physical properties and influence the macroscopic materials properties essentially. Hence, functional properties may occur inside interfaces and not in the bulk of a device or functionality is determined by the composite. Examples of wall structures and their local features related with ferroic, non-ferroic and biomaterials will be given. * E-mail: ubis@uni-hamburg.de Keywords: twin walls, interfaces, ferroics, metamict minerals, biominerals.
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