Regensburg 2000 – wissenschaftliches Programm

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DF: Dielektrische Festkörper

DF 7: Poster

DF 7.6: Poster

Donnerstag, 30. März 2000, 09:30–13:00, C

NMR STUDY OF DOMAIN STRUCTURE IN TMCC CRYSTALS — •Samir Mulla-Osman, Dieter Michel, and Georg Völkel — Universität Leipzig, Fakultät für Physik und Geowissenschaften, Linne-Straße 5, 04103

35Cl and 14N NMR investigations on single crystals of Tetramethylammonium Cadmium Chloride (CH3)4NCdCl3 (TMCC) are performed to get more information about structural changes near the phase transitions. In combination with NQR measurements which are only selective to changes in the electronic structure, the orientation selective NMR measurement enable the study of the formation of ferroelastic domains. The results are compared in detail with recent XRD measurements [I. Peral, G. Madariaga and T. Breczewski, University of Bilbao, 1999, private communication].