Dielectric properties ofBaTiO3/SrTiO3multilayered thin films prepared by pulsed laser deposition
作者:
B. D. Qu,
M. Evstigneev,
D. J. Johnson,
R. H. Prince,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 72,
issue 11
页码: 1394-1396
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.121066
出版商: AIP
数据来源: AIP
摘要:
BaTiO3/SrTiO3multilayered thin films were deposited on Si and Pt/Si substrates. X-ray diffraction clearly shows the formation of the superstructures. Phase transition properties were studied via dielectric measurements. Glassy behavior, characterized by a strong frequency dispersion of dielectric properties, was found in samples with a total thickness of 400 nm, while in samples with a total thickness of 800 nm, normal ferroelectric phase transitions with two dielectric peaks were observed. A preliminary interpretation assumes that size effects which frustrate long range ferroelectric ordering may lead to the relaxational behavior inBaTiO3/SrTiO3superstructures. ©1998 American Institute of Physics.
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