High-resolution electron microscopy investigations on stacking faults in SrBi2Ta2O9 ferroelectric thin films

2001 ◽  
Vol 78 (7) ◽  
pp. 973-975 ◽  
Author(s):  
X. H. Zhu ◽  
A. D. Li ◽  
D. Wu ◽  
T. Zhu ◽  
Z. G. Liu ◽  
...  
2000 ◽  
Vol 639 ◽  
Author(s):  
Philomela Komninou ◽  
Joseph Kioseoglou ◽  
Eirini Sarigiannidou ◽  
George P. Dimitrakopulos ◽  
Thomas Kehagias ◽  
...  

ABSTRACTThe interaction of growth intrinsic stacking faults with inversion domain boundaries in GaN epitaxial layers is studied by high resolution electron microscopy. It is observed that stacking faults may mediate a structural transformation of inversion domain boundaries, from the low energy types, known as IDB boundaries, to the high energy ones, known as Holt-type boundaries. Such interactions may be attributed to the different growth rates of adjacent domains of inverse polarity.


1992 ◽  
Vol 23 (4) ◽  
pp. 1063-1070
Author(s):  
David J. Smith ◽  
Rob W. Glaisher ◽  
Z. G. Li ◽  
Ping Lu ◽  
M. R. McCartney ◽  
...  

2006 ◽  
Vol 252 (13) ◽  
pp. 4527-4530
Author(s):  
Ch.B. Lioutas ◽  
N. Frangis ◽  
S. Soumelidis ◽  
S. Chiussi ◽  
E. López ◽  
...  

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.


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