Investigation of transport properties, flux pinning mechanisms and fluctuations induced conductivity of SiO2 nanoparticles doped YBa2Cu3O7-d thick films on silver substrates

Author(s):  
Yassine Slimani ◽  
Essia Hannachi ◽  
Munirah A. Almessiere ◽  
Haya S. Aldosari ◽  
Sarah A. Alotaibi ◽  
...  
1989 ◽  
Vol 66 (3) ◽  
pp. 1480-1482 ◽  
Author(s):  
J. M. Aponte ◽  
M. Octavio

1990 ◽  
Vol 209 ◽  
Author(s):  
P. L. Gai ◽  
M. Kunchur ◽  
E. M. McCarron

ABSTRACTSubstitutional effects of strontium in La-Cu-O system and defects accommodating stoichiometric deviations have been investigated. The extended shear defects are analyzed using electron microscopy and their role in superconducting transport properties has been examined by magnetic measurements. The initial results suggest that the defects enhance flux pinning.


2009 ◽  
Vol 54 (6) ◽  
pp. 2343-2348 ◽  
Author(s):  
Mahipal Ranot ◽  
W.K. Seong ◽  
Soon-Gil Jung ◽  
W.N. Kang

1989 ◽  
Vol 4 (3) ◽  
pp. 501-503 ◽  
Author(s):  
D. S. Ginley ◽  
M. A. Mitchell ◽  
J. F. Kwak ◽  
E. L. Venturini ◽  
R. J. Baughman ◽  
...  

Thick (20–300 μm) freestanding polycrystalline films of ceramic YBa2Cu3O6.9 have been obtained by resintering YBa2Cu3O6.9 powder in air after screen printing onto fused silica substrates. An interfacial reaction occurs between the powder and the silica substrate which efficiently detaches the resintered film upon cooling. The magnetization and transport properties of these films are comparable to those for high quality bulk ceramic samples.


1999 ◽  
Vol 79 (8) ◽  
pp. 1161-1173 ◽  
Author(s):  
H. K. Barik ◽  
S. Bhattacharya ◽  
S. Chatterjee ◽  
P. K. Pal ◽  
B. K. Chaudhuri

1995 ◽  
Vol 10 (9) ◽  
pp. 2203-2210 ◽  
Author(s):  
J.E. Tkaczyk ◽  
J.A. Sutliff ◽  
J.A. DeLuca ◽  
P.J. Bednarczyk ◽  
C.L. Briant ◽  
...  

The electron backscattering pattern technique has been applied to the microstructural investigation of Tl(1223) thick films formed by vapor-phase thallination of Ag-containing Ba–Ca–Cu–oxide precursors. For samples grown on polycrystalline YSZ, considerable biaxial alignment is found in localized, multigrain regions as wide a 100 μm or more. However, on scales above 1 mm the overall texture remains only uniaxial with the c-axes (i.e., [001]) aligned perpendicular to the plane of the substrate. On single-crystal KTaO3 an epitaxial relationship is evident which persists to the surface of a 3 μm thick film. Modest variations in the processing protocol yield films containing grains oriented with the c-axis in the plane, resulting in the degradation of transport properties. The data suggest a growth mode in which sparse nucleation occurs at the substrate followed by rapid lateral crystallization.


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