Regensburg 2000 – wissenschaftliches Programm
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DF: Dielektrische Festkörper
DF 3: Elektrische und optische Eigenschaften III
DF 3.3: Vortrag
Dienstag, 28. März 2000, 10:30–10:50, H11
Twodimensional 2H NMR exchange spectroscopy on conducting ionic crystals — •Jens Totz1, Yu. N. Ivanov2, Dieter Michel1, and I. P. Alexandrova2 — 1Universität Leipzig, Fakultät für Physik und Geowissenschaften, Linnestraße 5, D-04103 Leipzig, Germany — 2L.V. Kirensky Institute of Physics, Russian Academy of Science, Siberian Branch, 660036 Krasnoyarsk, Russia
The two-dimensional (2D) deuterium NMR exchange spectroscopy is applied to two types of conducting ionic crystals for the study of hydrogen mobility and conductivity, viz. partially deuterated ammonium hydrogen selenate, NH4HSeO4 (AHSe), and partially deuterated mixed crystals of betaine phosphate (DBP) and betaine phosphite (DBPI), DBP1-xDBPIx. In both crystals Arrhenius-like chemical exchange processes of deuterons between different hydrogen bridges are studied. With the help of conductivity data from dielectric measurements quantitative relations between the exchange and conductivity processes are obtained.