Flux pinning and critical currents at low-angle grain boundaries in high-temperature superconductors

2002 ◽  
Vol 81 (15) ◽  
pp. 2803-2805 ◽  
Author(s):  
D. Agassi ◽  
D. K. Christen ◽  
S. J. Pennycook
Keyword(s):  
High Temperature ◽  
Grain Boundaries ◽  
Flux Pinning ◽  
High Temperature Superconductors ◽  
Critical Currents

Limits to critical currents in high-temperature superconductors: What we can learn from tailored defects

1992 ◽  
Author(s):  
D. K. Christen ◽  
J. R. Thompson ◽  
H. R. Kerchner ◽  
B. C. Sales ◽  
B. C. Chakoumakos ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Critical Currents

INTRINSIC MAGNETIZATION RELAXATION PROPERTIES OF Y1:2:3

1991 ◽  
Vol 05 (04) ◽  
pp. 277-284 ◽  
Author(s):  
Y.Y. XUE ◽  
Z.J. HUANG ◽  
L. GAO ◽  
P.H. HOR ◽  
R.L. MENG ◽  
...  
Keyword(s):  
High Temperature ◽  
Critical State ◽  
Flux Pinning ◽  
High Temperature Superconductors ◽  
Distribution Model ◽  
Magnetization Relaxation ◽  
Pinning Potential ◽  
Monotonically Increasing Function ◽  
Monotonically Decreasing Function ◽  
Increasing Function

The intrinsic magnetization relaxation rate R(T)≡dM(t, T)/d ln t and the pinning potential U0(T) have been determined for single crystalline and melt-textured YBa2Cu3O7 (Y1:2:3) high temperature superconductors of different sizes in their critical state. In contrast to previous reports, R(T) is a monotonically decreasing function and U0(T), deduced from R(T), a monotonically increasing function of temperature. The unusual temperature dependence of U0 is qualitatively explained in terms of a collective flux pinning. The U0-distribution model previously proposed for HTS’s is not consistent with certain experimental observations.

Mechanisms for enhanced supercurrent across meandered grain boundaries in high-temperature superconductors

2007 ◽  
Vol 102 (8) ◽  
pp. 083912 ◽  
Author(s):  
D. M. Feldmann ◽  
T. G. Holesinger ◽  
R. Feenstra ◽  
C. Cantoni ◽  
W. Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Boundaries ◽  
High Temperature Superconductors
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