On the Study of “Further Meyer–Neldel Rule” in Thermally Activated High Field Conduction of Se-Te-Pb Glassy Alloys

Anjali ◽  
Balbir Singh Patial ◽  
Nagesh Thakur
1994 ◽  
Vol 235-240 ◽  
pp. 3139-3140 ◽  
G. Bonfait ◽  
A. Casaca ◽  
R.T. Henriques ◽  
M. Lenkens ◽  
H. Schlick ◽  

1989 ◽  
Vol 169 ◽  
D. K. Christen ◽  
C. E. Klabunde ◽  
R. Feenstra ◽  
D. H. Lowndes ◽  
D. Norton ◽  

AbstractThe electrical transport properties of a series of Y1Ba2Cu307.x thin films deposited onto single crystal substrates by thermal coevaporation and laser ablation were investigated. For fully epitaxial, c‐oriented films on (001) substrate surfaces, the critical current density Jc showed large high‐field enhancements for the film aligned with H parallel to the copper‐oxygen planes. With H||c, a precipitous decay of Jc with increasing field is described by thermally activated flux motion. Films on (110) SrTiO3 substrates were comprised of finely‐divided arrays of grains having [110], and <103>‐type orientations, and exhibited granular behavior. For these “triaxial” films, the transport dissipation was also thermally activated but with much smaller energy barriers.

Vacuum ◽  
2009 ◽  
Vol 83 (9) ◽  
pp. 1169-1173 ◽  
N. Mehta ◽  
V.S. Kushwaha ◽  
A. Kumar

T. F. Kelly ◽  
P. J. Lee ◽  
E. E. Hellstrom ◽  
D. C. Larbalestier

Recently there has been much excitement over a new class of high Tc (>30 K) ceramic superconductors of the form A1-xBxCuO4-x, where A is a rare earth and B is from Group II. Unfortunately these materials have only been able to support small transport current densities 1-10 A/cm2. It is very desirable to increase these values by 2 to 3 orders of magnitude for useful high field applications. The reason for these small transport currents is as yet unknown. Evidence has, however, been presented for superconducting clusters on a 50-100 nm scale and on a 1-3 μm scale. We therefore planned a detailed TEM and STEM microanalysis study in order to see whether any evidence for the clusters could be seen.A La1.8Sr0.2Cu04 pellet was cut into 1 mm thick slices from which 3 mm discs were cut. The discs were subsequently mechanically ground to 100 μm total thickness and dimpled to 20 μm thickness at the center.

1998 ◽  
Vol 184-185 (1-2) ◽  
pp. 339-342 ◽  
L Parthier

2000 ◽  
Vol 80 (12) ◽  
pp. 2813-2825
O. N. Senkov, J. J. Jonas, F. H. Froes

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