The role of thermally-induced internal stresses on the tunabilityof textured barium strontium titanate films

2004 ◽  
Vol 85 (6) ◽  
pp. 985-987 ◽  
Author(s):  
A. Sharma ◽  
Z.-G. Ban ◽  
S. P. Alpay ◽  
J. V. Mantese
Keyword(s):  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Internal Stresses ◽  
Thermally Induced ◽  
Barium Strontium

Dependence of dielectric properties on internal stresses in epitaxial barium strontium titanate thin films

2001 ◽  
Vol 78 (16) ◽  
pp. 2354-2356 ◽  
Author(s):  
Hao Li ◽  
A. L. Roytburd ◽  
S. P. Alpay ◽  
T. D. Tran ◽  
L. Salamanca-Riba ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Internal Stresses ◽  
Barium Strontium

Tuning the Tunability in Epitaxial Barium Strontium Titanate Film via Internal Stresses

2002 ◽  
Vol 748 ◽  
Author(s):  
Z.-G. Ban ◽  
S. P. Alpay
Keyword(s):  
Film Thickness ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Film Growth ◽  
Structural Phase ◽  
Misfit Strain ◽  
Substrate Material ◽  
Internal Stresses ◽  
Misfit Dislocations ◽  
Barium Strontium

ABSTRACTThe tunability of epitaxial barium strontium titanate films is analyzed theoretically for the first time using a modified phenomenological Landau-Devonshire approach taking into account the formation of unusual ferroelectric phases that cannot form in bulk and single-crystal ceramics. It is shown that enhanced tunability can be achieved by adjusting the misfit strain especially in the vicinity of a structural phase transformation. The internal stresses in epitaxial films as characterized by the misfit strain can be controlled by changing the substrate material and/or varying the film thickness. The latter is due to the possibility of stress relaxation by formation of misfit dislocations that relieve epitaxial stresses at film growth temperature. Based on the thermodynamic model, we provide quantitative estimations of tunability of (001) Ba0.5Sr0.5TiO3 films on (001) LaAlO3 (LAO) and SrTiO3 (STO) as a function of film thickness. The analysis indicates that films on STO substrates should be as thick as possible in order to achieve optimum tunability. To obtain maximum tunability on LAO substrates, the thickness of films should be as close as possible to a critical film thickness (∼120 nm).

Role of elastic energy in the formation of ferroelectric barium strontium titanate films on sapphire

2015 ◽  
Vol 57 (4) ◽  
pp. 815-819 ◽  
Author(s):  
A. V. Tumarkin ◽  
S. A. Kukushkin ◽  
A. V. Osipov ◽  
A. S. Ankudinov ◽  
A. A. Odinets
Keyword(s):  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Elastic Energy ◽  
Barium Strontium

A phase shifter on a slot line loaded with varactors designed on the basis on nanodimensional films of barium-strontium titanate

2007 ◽  
Vol 52 (11) ◽  
pp. 1300-1304 ◽  
Author(s):  
Vas. M. Mukhortov ◽  
S. I. Masychev ◽  
Yu. I. Golovko ◽  
A. V. Chub ◽  
Vl. M. Mukhortov
Keyword(s):  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Phase Shifter ◽  
Slot Line ◽  
Barium Strontium

Structural, thermal and optoelectrical properties of pure and gadolinium doped barium strontium titanate for DSSC applications

2021 ◽  
Author(s):  
S. Karthikeyan ◽  
P. Thirunavukkarasu ◽  
S. Surendhiran ◽  
Y.A. Syed Khadar ◽  
A. Balamurugan ◽  
...  
Keyword(s):  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Barium Strontium

Structural and Electrical Properties of Nanocrystalline Diamond based Barium Strontium Titanate Varactors

2008 ◽  
Vol 377 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Venkataramanan Gurumurthy ◽  
Sathyaharish Jeedigunta ◽  
Sam Baylis ◽  
Priscila Spagnol ◽  
John Bumgarner ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Nanocrystalline Diamond ◽  
Barium Strontium ◽  
Structural And Electrical Properties
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