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DF: Fachverband Dielektrische Festkörper
DF 24: Crystallography in Materials Science (Joint Session with KR)
DF 24.1: Hauptvortrag
Donnerstag, 3. April 2014, 15:00–15:30, CHE 184
Crystals: Structure, Properties and Heart of Energy Conversion Devices — •Tilmann Leisegang1, Juliane Hanzig2, Erik Mehner2, Matthias Zschornak2, Falk Meutzner2, Tina Nestler2, Bianca Störr2, Charaf Cherkouk2, Ulrike Wunderwald1, and Dirk C. Meyer2 — 1Fraunhofer-THM, Am-St.-Niclas-Schacht 13, 09599 Freiberg — 2TU Bergakademie Freiberg, Institut für Experimentelle Physik, Leipziger Str. 23, 09596 Freiberg
Crystalline materials are wide spread in our today's life. More than 98 % of the solid fraction of the earth comprises crystalline matter, most of which are oxides. Single-crystals in particular are the basis for many applications - lasers, LEDs, sensors, etc. - and play an important role in fundamental research for instance in superconductivity or magnetic properties. The discipline that elucidates the impact of the crystal structure on the physical properties of particularly crystalline materials - crystallography - is of specific importance for the design of new materials. X-ray and other diffraction methods are of great relevance for the investigation of crystal structures and their peculiarities. Moreover, crystallography can be utilized to establish new concepts and thus may contribute solving today's challenges in science and technology. In this context, the work presented highlights several examples. First, it is demonstrated how composition variations can be used to change the three dimensional crystal structure - including commensurate or incommensurate modulated phases - in order to tune the materials properties. Second, applications of crystals for energy conversion devices are presented.