Critical currents and magnetic properties of Bi- and Tl-based new high Tc superconductors

Cryogenics ◽  
1989 ◽  
Vol 29 (3) ◽  
pp. 286-290 ◽  
Author(s):  
K. Togano ◽  
H. Kumakura ◽  
D.R. Dietderich
Keyword(s):  
Magnetic Properties ◽  
Critical Currents ◽  
High Tc Superconductors ◽  
High Tc

CRITICAL CURRENTS AND MAGNETIC PROPERTIES OF CERAMIC HIGH-Tc SUPERCONDUCTORS

1989 ◽  
Vol 03 (05) ◽  
pp. 375-380 ◽  
Author(s):  
G. BLATTER ◽  
H. DERSCH ◽  
T. DUPRÉ ◽  
J. RHYNER ◽  
H.R. ZELLER
Keyword(s):  
Magnetic Properties ◽  
Critical Current ◽  
Critical State ◽  
Critical Currents ◽  
Critical State Model ◽  
State Model ◽  
High Tc Superconductors ◽  
High Tc

Experiments on critical current and magnetic properties of ceramic YBa 2 Cu 3 O 7−δ are discussed and analyzed in terms of an adapted critical state model.

Doping induced enhancement of the critical currents of grain boundaries in high-Tc superconductors

2000 ◽  
Vol 341-348 ◽  
pp. 1393-1396 ◽  
Author(s):  
J. Mannhart ◽  
H. Bielefeldt ◽  
B. Goetz ◽  
H. Hilgenkamp ◽  
A. Schmehl ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Critical Currents ◽  
High Tc Superconductors ◽  
High Tc

NANOSCOPIC PHASE SEPARATION AND THE UNIVERSAL TRANSPORT AND MAGNETIC PROPERTIES OF HIGH Tc SUPERCONDUCTORS

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3528-3531
Author(s):  
J. JUNG ◽  
H. YAN ◽  
H. DARHMAOUI ◽  
M. ABDELHADI
Keyword(s):  
Magnetic Properties ◽  
Phase Separation ◽  
Temperature Dependence ◽  
Current Density ◽  
Low Temperatures ◽  
Energy Barrier ◽  
Vortex Motion ◽  
Superfluid Density ◽  
High Tc Superconductors ◽  
High Tc

We have found the correlation between nanoscopic phase separation in the copper-oxygen planes of YBCO and TlBCCO and the transport and magnetic properties of these materials in the a-b planes such as: the temperature dependence of the critical current density Jc( T ), the temperature dependence of the superfluid density ns( T )∝1/λ2( T ) at low temperatures, the temperature dependence of the normalized logarithmic relaxation rate S(T), and the dependence of the effective energy barrier against vortex motion on the current density Ueff( J ). These properties are controlled by the ratio of the amount of an underdoped filamentary phase to that of an optimally doped one.

MAGNETIC PROPERTIES OF THE HIGH Tc SUPERCONDUCTORS BiSrCaCuO AND TlBaCaCuO

1989 ◽  
Vol 03 (01) ◽  
pp. 77-85 ◽  
Author(s):  
Y. D. DAI ◽  
C. LIN ◽  
W. B. ZHANG ◽  
S. Q. FENG ◽  
X. ZHU ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Flux Pinning ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
High Tc Superconductors ◽  
Magnetic Current ◽  
High Tc ◽  
Bean Model ◽  
Current Densities ◽  
Magnetic Hysteresis Loops

Magnetic properties of the high T c superconductors BiSrCaCuO and TlBaCaCuO were investigated systematically. Magnetic current densities were calculated from magnetic hysteresis loops of bulk and powdered samples by Bean model. The results showed that flux pinning in these materials is much weaker than that in YBaCuO.

The effect of twins on critical currents of high Tc superconductors

1989 ◽  
Vol 162-164 ◽  
pp. 1605-1606 ◽  
Author(s):  
F.J. Blunt ◽  
A.M. Campbell ◽  
P.P. Edwards ◽  
J.E. Evetts ◽  
P. Freeman ◽  
...  
Keyword(s):  
Critical Currents ◽  
High Tc Superconductors ◽  
High Tc
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