J. Phys. IV France
Volume 08, Numéro PR9, December 1998
2nd European Meeting on Integrated Ferroelectrics
Page(s) Pr9-105 - Pr9-108
2nd European Meeting on Integrated Ferroelectrics

J. Phys. IV France 08 (1998) Pr9-105-Pr9-108

DOI: 10.1051/jp4:1998917

Anomalous elastic and dielectric behavior in nanocrystalline Ca-modified lead titanate (PTC) films

C. Ziebert1, J.K. Krüger1, R. Birringer1, H. Schmitt1 and B. Jiménez2

1  Univeristät des Saarlandes, Fachbereich Physik, Bau 38, 66123 Saarbrücken, Germany
2  Instituto de Ciencia de Materiales de Madrid, CSIC, Campus de Cantoblanco s/n, 28049 Madrid, Spain

Thin amorphous PTC-films of 1 µm thickness were produced by rf-sputtering at room temperature. A subsequent annealing process enabled us to prepare different grain sizes which have been characterised by x-ray powder diffraction. At the transition from the amorphous to the nanocrystalline state the elastic modulus c11 measured by HR-Brillouin spectroscopy exhibited a surprising instability. The dielectric constant showed not only the expected increase with increasing grain size but also a significant relaxor behavior.

© EDP Sciences 1998