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Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 9: Focus: Polar oxide crystals and solid solutions

KFM 9.4: Vortrag

Mittwoch, 18. März 2020, 10:30–10:50, TOE 317

Ion Transport in LiNbO3 - An OverviewJohanna Uhlendorf1, Peter Fielitz1, Erwin Hüger1,2, Lars Dörrer1,2, Steffen Ganschow3, Klaus-Dieter Becker4, Holger Fritze5, Günter Borchardt1, and •Harald Schmidt1,21TU Clausthal, Institut für Metallurgie — 2TU Clausthal, Clausthaler Zentrum für Materialtechnik — 3Leibniz-Institut für Kristallzüchtung, Berlin — 4TU Braunschweig, Institut für Physikalische und Theoretische Chemie — 5TU Clausthal, Institut für Energieforschung und Physikalische Technologien

Lithium niobate (LN) is one of the most technologically important polar metal oxides with an extraordinary combination of ferroelectric, piezoelectric, acoustic, optical as well as ion conducting properties. The self-diffusion of the ionic constituents and the underlying point defects of LN are of high importance for the overall conductivity, structural disorder, stability of defect clusters, ferroelectric domain wall pinning, high temperature stability and optical applications. We present a comprehensive overview of the state-of-the-art knowledge on the diffusion of Li, Nb, and O in LN as investigated in our laboratories during the last years. The experiments were carried out with stable tracers in combination with secondary ion mass spectrometry, neutron reflectometry and high-temperature optical spectroscopy.

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