Improvements in tunability of (Ba0.5Sr0.5)TiO3 thin films by use of metalorganic chemical vapor deposited (Ba,Sr)RuO3 interfacial layers

2001 ◽  
Vol 79 (7) ◽  
pp. 1012-1014 ◽  
Author(s):  
Young-Ah Jeon ◽  
Eun-Suck Choi ◽  
Tae-Suck Seo ◽  
Soon-Gil Yoon
1999 ◽  
Vol 14 (7) ◽  
pp. 2732-2738 ◽  
Author(s):  
Ch. Grigis ◽  
S. Schamm ◽  
D. Dorignac

New structural planar defects in Ba-deficient Y1Ba2Cu3O7−δ (YBCO) (1:1.6:3) thin films grown on NdGaO3 and SrTiO3 substrates by metalorganic chemical vapor deposition have been observed by means of high-resolution electron microscopy. The defects are associated with perturbations of the YBCO “1:2:3” stacking sequences along the c direction, which give rise to structural variants with locally “2:5:7,” “3:4:7,” or “4:6:10” cationic stoichiometries. The defects can be consistently interpreted as CuO–YO–CuO/CuO conversions or YO/BaO (BaO/YO) interconversions in the (a,b) planes and extending over a few nanometers along the c axis. Structural models based on image matching with simulations are proposed for two particular cases. It is thought that these structural imperfections can be effective sites of flux pinning.


2007 ◽  
Vol 42 (8) ◽  
pp. 2758-2765 ◽  
Author(s):  
M. A. Eleruja ◽  
G. O. Egharevba ◽  
O. A. Abulude ◽  
O. O. Akinwunmi ◽  
C. Jeynes ◽  
...  

1991 ◽  
Vol 58 (10) ◽  
pp. 1109-1111 ◽  
Author(s):  
J. H. Takemoto ◽  
C. M. Jackson ◽  
H. M. Manasevit ◽  
D. C. St. John ◽  
J. F. Burch ◽  
...  

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