https://doi.org/10.1007/s100510051184
Size dependence of dielectric properties and structural metastability in ferroelectrics
Department of Physics, Shandong University, Jinan, 250100, P.R. China
Corresponding author: a xmliu@sdu.edu.cn
Received:
3
August
1998
Revised:
22
November
1998
Published online: 15 October 1999
The size effect of the dielectric properties and the barrier height was
investigated in the ferroelectric solid solution BaxSr
TiO3
system. The decrease of the grain size causes the suppression of the
ferroelectricity, and the increase of the relaxation frequency. Barrier
heights increase with increasing grain size. The result is analogous to
magnetic phase transitions in nanocrystals and other solid-solid phase
transitions in nanocrystals. It suggests a general rule that may be of use
in the discovery of new metastable phases. An explanation of this phenomenon
was given by an electric potential model that agrees well with the
experimental results. For BaxSrTiO3 system, the decrease of x
causes the decrease of the barrier height.
PACS: 77.22.Gm – Dielectric loss and relaxation / 77.80.Bh – Phase transitions and Curie point / 77.80.-e – Ferroelectricity and antiferroelectricity
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
