Microstructure and enhanced in-plane ferroelectricity of Ba0.7Sr0.3TiO3 thin films grown on MgAl2O4 (001) single-crystal substrate

2006 ◽  
Vol 89 (23) ◽  
pp. 232906 ◽  
Author(s):  
X. Y. Zhou ◽  
T. Heindl ◽  
G. K. H. Pang ◽  
J. Miao ◽  
R. K. Zheng ◽  
...  
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
Single Crystal Substrate ◽  
Crystal Substrate

Homoepitaxial Alignment of SrTiO3 Thin Films Prepared by Metallo-Organic Decomposition.

1991 ◽  
Vol 249 ◽  
Author(s):  
Gabriel Braunstein ◽  
Gustavo R. Paz-Pujalt
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
Solid Phase ◽  
Single Crystal Substrate ◽  
Layer By Layer ◽  
Extrinsic Factors ◽  
Ion Channeling ◽  
Random Nucleation ◽  
Crystal Substrate ◽  
Organic Decomposition

ABSTRACTWe demonstrate the homoepitaxial growth of SrTiO3 prepared by the method of metallo-organic decomposition (MOD). Thin films of SrTiO3 are prepared by spin-coating and thermal decomposition of a solution of metallo-organic compounds, on single crystal, <100> oriented, SrTiO3 substrates and subsequently heat treated at temperatures ranging from 650°C to 1100°C for 30 minutes. Heat treatment at 1100°C results in the formation of single-crystal SrTiO3, perfectly aligned with respect to the underlying substrate.Ion-channeling analysis shows that the transformation to singlecrystal material proceeds epitaxially from the coating-substrate interface towards the surface of the sample. Transmission electron microscopy (TEM) studies of partially regrown samples reveal two distinct phases: an epitaxially aligned single-crystal phase, adjacent to the substrate, and a polycrystalline phase on top. On the basis of these observations, it is proposed that the crystallization of the MOD films involves the competition between two processes: layer-by-layer solid phase epitaxy and random nucleation and growth of crystallites. Layerby- layer epitaxy is the predominant crystallization mechanism unless it is inhibited by extrinsic factors like the contamination of the interface between the MOD film and the single-crystal substrate.

Enhanced in-plane ferroelectricity in Ba0.7Sr0.3TiO3 thin films grown on MgO (001) single-crystal substrate

2005 ◽  
Vol 86 (21) ◽  
pp. 212904 ◽  
Author(s):  
D. Y. Wang ◽  
Y. Wang ◽  
X. Y. Zhou ◽  
H. L. W. Chan ◽  
C. L. Choy
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
Single Crystal Substrate ◽  
Crystal Substrate

scholarly journals Giant Wrinkles on the Surface of Epitaxial BaTiO3 Thin Films with Drastic Shrinkage during Transfer from a MgO(100) Single-Crystal Substrate to a Flexible Polyethylene Terephthalate Sheet

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7326
Author(s):  
Hiroaki Nishikawa ◽  
Shinji Umatani ◽  
Tomofumi Mizuyama ◽  
Akihiro Hiraoka ◽  
Katsuhiro Mikami
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
Polyethylene Terephthalate ◽  
Transfer Process ◽  
Single Crystal Substrate ◽  
Epitaxial Thin Films ◽  
Functional Oxides ◽  
Crystal Substrate ◽  
Batio3 Thin Film

The transfer of ferroelectric and piezoelectric BaTiO3 epitaxial thin films from an original MgO(100) single-crystal substrate to a polyethylene terephthalate (PET) sheet has been studied to fabricate flexible epitaxial functional oxides. The outline of our previous transfer process is as follows: the epitaxial BaTiO3 thin films were deposited on the MgO(100). Then, the surface of the BaTiO3 was adhered onto a PET sheet. Finally, only the MgO(100) substrate was dissolved in a phosphoric aqueous solution, which resulted in the transfer of the epitaxial BaTiO3 thin film from the MgO(100) to a PET sheet. To establish this transfer process, our aim was to prevent any damage, such as cracks and exfoliation, during the transfer of the epitaxial functional oxides. We found that a Pt buffer layer with a ductile nature was effective for improving the quality of transferred epitaxial BaTiO3 thin films. Moreover, the epitaxial BaTiO3 thin films showed a drastic shrinkage of ca. 10%. The surfaces of the shrunk, epitaxial BaTiO3 thin films showed giant wrinkles with a micrometer-order amplitude and a 10-μm-order periodicity without any damage. The epitaxial BaTiO3 thin films with giant wrinkles, accompanied by drastic shrinkage, are similar to the thin films that are coated on a pre-stretched elastomer, which is one of the fabrication processes of stretchable devices.

scholarly journals High-performance ferroelectric non-volatile memory based on La-doped BiFeO3 thin films

RSC Advances ◽  
2020 ◽  
Vol 10 (31) ◽  
pp. 18039-18043
Author(s):  
Wanqiong Dai ◽  
Yuanxiang Li ◽  
Caihong Jia ◽  
Chaoyang Kang ◽  
Mengxin Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
High Performance ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Single Crystal Substrate ◽  
Bifeo3 Thin Films ◽  
Crystal Substrate ◽  
Non Volatile Memory ◽  
La Doped

An ultrathin (6.2 nm) ferroelectric La0.1Bi0.9FeO3 (LBFO) film was epitaxially grown on a 0.7 wt% Nb-doped SrTiO3 (001) single-crystal substrate by carrying out pulsed laser deposition to form a Pt/La0.1Bi0.9FeO3/Nb-doped SrTiO3 heterostructure.

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