scholarly journals Crystal Structure of New Iron Based High-Tc Superconductor

2009 ◽  
Vol 19 (2) ◽  
pp. 119-122
Author(s):  
Chul-Ho LEE
Author(s):  
H.-J. Ou ◽  
J. M. Cowley

Using the dedicate VG-HB5 STEM microscope, the crystal structure of high Tc superconductor of YBa2Cu3O7-x has been studied via high resolution STEM (HRSTEM) imaging and nanobeam (∽3A) diffraction patterns. Figure 1(a) and 2(a) illustrate the HRSTEM image taken at 10' times magnification along [001] direction and [100] direction, respectively. In figure 1(a), a grain boundary with strong field contrast is seen between two crystal regions A and B. The grain boundary appears to be parallel to a (110) plane, although it is not possible to determine [100] and [001] axes as it is in other regions which contain twin planes [3]. Following the horizontal lattice lines, from left to right across the grain boundary, a lattice bending of ∽4° is noticed. Three extra lattice planes, indicated by arrows, were found to terminate at the grain boundary and form dislocations. It is believed that due to different chemical composition, such structure defects occur during crystal growth. No bending is observed along the vertical lattice lines.


2004 ◽  
Vol 350 (1-3) ◽  
pp. E335-E337
Author(s):  
N Golosova ◽  
A Mirmelstein ◽  
V Bobrovskii ◽  
E Mitberg ◽  
A Podlesnyak ◽  
...  

1995 ◽  
Vol 119 (1) ◽  
pp. 115-119 ◽  
Author(s):  
William T.A. Harrison ◽  
Stan Roliard ◽  
John T. Vaughey ◽  
Lumei Liu ◽  
Allan J. Jacobson

ChemInform ◽  
1989 ◽  
Vol 20 (1) ◽  
Author(s):  
H. H. OTTO ◽  
T. ZETTERER ◽  
K. F. RENK

2008 ◽  
Vol 11 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Luis Gallego Martinez ◽  
Jesualdo Luiz Rossi ◽  
Marcos Tadeu D'Azeredo Orlando ◽  
Carlos Augusto Cardoso Passos ◽  
Hamilton Perez Soares Corrêa

2009 ◽  
Vol 469 (15-20) ◽  
pp. 1052-1054 ◽  
Author(s):  
D. Ahmad ◽  
I. Park ◽  
G.C. Kim ◽  
J.H. Lee ◽  
Z.-A. Ren ◽  
...  

1988 ◽  
Vol 02 (03n04) ◽  
pp. 651-656
Author(s):  
J.G. ZHAO ◽  
L.Y. CAI ◽  
Y.L. ZHANG ◽  
X.R. CHENG ◽  
F.H. Li

Electron diffraction and X-ray energy dispersive analysis are used to determine the phases and chemical composition of the compound Th(Y)-Ba-Cu-O. The main phase is Th(Y)Sa2Cu3O 7−x which has the similar crystal structure as YBa2Cu3O 7−x and shows the superconductivity with Tc=67 K.


Nature ◽  
1987 ◽  
Vol 327 (6124) ◽  
pp. 687-689 ◽  
Author(s):  
P. Bordet ◽  
C. Chaillout ◽  
J. J. Capponi ◽  
J. Chenavas ◽  
M. Marezio

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