Journal ArticleDOI
Epitaxial ferroelectric Ba0.5Sr0.5TiO3 thin films for room-temperature tunable element applications
Chonglin Chen,H. H. Feng,Z. Zhang,A. Brazdeikis,Z. J. Huang,Wei-Kan Chu,Ching-Wu Chu,Felix A. Miranda,F. W. Van Keuls,Robert R. Romanofsky,Yung Liou +10 more
TLDR
In this article, Ba0.5Sr 0.5TiO3 thin films have been synthesized on (001) LaAlO3 substrates by pulsed laser ablation.Abstract:
Perovskite Ba0.5Sr0.5TiO3 thin films have been synthesized on (001) LaAlO3 substrates by pulsed laser ablation. Extensive x-ray diffraction, rocking curve, and pole-figure studies suggest that the films are c-axis oriented and exhibit good in-plane relationship of 〈100〉BSTO//〈100〉LAO. Rutherford backscattering spectrometry studies indicate that the epitaxial films have excellent crystalline quality with an ion beam minimum yield χmin of only 2.6%. The dielectric property measurements by the interdigital technique at 1 MHz show room-temperature values of the relative dielectric constant, er, and loss tangent, tan δ, of 1430 and 0.007 with no bias, and 960 and 0.001 with 35 V bias, respectively. The obtained data suggest that the as-grown Ba0.5Sr0.5TiO3 films can be used for development of room-temperature tunable microwave elements.read more
Citations
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Journal ArticleDOI
Dielectric properties in heteroepitaxial Ba0.6Sr0.4TiO3 thin films: Effect of internal stresses and dislocation-type defects
TL;DR: In this paper, a series of heteroepitaxial Ba0.6Sr0.4TiO3 were grown on 0.29(LaAlO3):0.35(Sr2TaAlO6) substrates using pulsed-laser deposition.
Journal ArticleDOI
Large dielectric constant (ε/ε0>6000) Ba0.4Sr0.6TiO3 thin films for high-performance microwave phase shifters
C. M. Carlson,T. V. Rivkin,P. A. Parilla,John Perkins,D. S. Ginley,A. B. Kozyrev,V. N. Oshadchy,A. S. Pavlov +7 more
TL;DR: In this paper, epitaxial Ba0.4Sr0.6TiO3 (BST) films via laser ablation were deposited on MgO and LaAlO3 substrates for tunable microwave devices.
Journal ArticleDOI
Ferroelectric phase transition and maximum dielectric permittivity of displacement type ferroelectrics (BaxSr1−xTiO3)
O. G. Vendik,S. P. Zubko +1 more
TL;DR: In this paper, the main interest in the area of practical applications of ferroelectrics, particularly at the microwave frequency, is oriented now to room temperature, and in this connection, FerroElectrics like BaxSr1−xTiO3 should be carefully studied.
Journal ArticleDOI
Oxides, Oxides, and More Oxides: High-κ Oxides, Ferroelectrics, Ferromagnetics, and Multiferroics
TL;DR: In this article, the authors review and critique the recent developments on multifunctional oxide materials, which are gaining a good deal of interest, focusing mainly on high-κ dielectric, ferroelectric, magnetic and multiferroic materials.
Journal ArticleDOI
Microstructure and dielectric properties of Ba1−xSrxTiO3 films grown on LaAlO3 substrates
TL;DR: In this paper, the microstructure and dielectric properties of barium strontium titanate, Ba1−xSrxTiO3, films grown by laser ablation on LaAlO3 substrates, where x=0.1, were investigated.
References
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Journal ArticleDOI
The Physics of Ferroelectric Memories
TL;DR: In this article, the authors describe a scenario where they are in the last stages of typing their thesis, the year is 1980, and it's a hot, hazy summer afternoon, a thunderstorm brews on the horizon.
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The dielectric response as a function of temperature and film thickness of fiber-textured (Ba,Sr)TiO3 thin films grown by chemical vapor deposition
TL;DR: The temperature and field-dependent permittivities of fiber-textured Ba0.7Sr0.3TiO3 thin films grown by liquid-source metalorganic chemical vapor deposition were investigated as a function of film thickness as discussed by the authors.
Journal ArticleDOI
Deposition of extremely thin (Ba,Sr)TiO3 thin films for ultra‐large‐scale integrated dynamic random access memory application
TL;DR: In this paper, the leakage current increases with increasing deposition temperature and this prevents the deposition temperature of the 20 nm thick TiO3 (BST) thin film from being increased to a value more than 640°C.