Disentanglement of intrinsic and extrinsic properties in highly functional Heusler materials

Datum

21.07.2015

Zeit

16:40 - 18:10

Sprecher

Dr. Sabine Wurmehl

Zugehörigkeit

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden und TU Dresden

Serie

TUD Physikalisches Kolloquium

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Host

Prof. Dr. Carsten Timm, Fachrichtung Physik

Beschreibung

Functional intermetallic materials such as Heusler compounds exhibit different electronic ground states such as spin-density-wave ordering, thermoelectricity, topological insulating properties, first-order phase transitions, metamagnetic transitions, high magnetic anisotropy, high magnetic moments and Curie temperature, as well as high spin polarization. This diversity renders intermetallics attractive materials to explore fundamental aspects of matter but also raises interest for the technological exploitation of their functionalities, e.g., in spintronics devices.
The key tool in the rational design of this class of materials is the knowledge and control of the properties and whether they are dominated by intrinsic factors (e.g. electronic structure) or by extrinsic factors (structural degree of order, segregation, and phase dynamics). We address these issues by combining crystal growth techniques with nuclear magnetic resonance (NMR). Here, we will illustrate this approach by discussing selected examples of the disentanglement of intrinsic and extrinsic properties in highly functional Heusler materials and the resulting iterative optimization of their functional properties.

Links

• http://tu-dresden.de/veranstaltungen/termin?id=TUD5523a06a495ec

Letztmalig verändert: 21.07.2015, 09:58:48