A ring circuit for the determination of dynamic error rates in high-temperature superconductor RSFQ circuits

1997 ◽  
Vol 10 (12) ◽  
pp. 991-994 ◽  
Author(s):  
B Ruck ◽  
B Oelze ◽  
E Sodtke
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor ◽  
Dynamic Error ◽  
Error Rates

Structure determination of the new high-temperature superconductor Y2Ba4Cu7O14+x

Nature ◽  
1988 ◽  
Vol 334 (6183) ◽  
pp. 596-598 ◽  
Author(s):  
P. Bordet ◽  
C. Chaillout ◽  
J. Chenavas ◽  
J. L. Hodeau ◽  
M. Marezio ◽  
...  
Keyword(s):  
High Temperature ◽  
Structure Determination ◽  
High Temperature Superconductor

A New Method to Obtain U(J) Relationship in High Temperature Superconductor

1997 ◽  
Vol 11 (06) ◽  
pp. 753-765 ◽  
Author(s):  
M. J. Qin ◽  
X. Jin ◽  
X. X. Yao ◽  
Y. X. Fu ◽  
X. S. Rong ◽  
...  
Keyword(s):  
High Temperature ◽  
Magnetic Relaxation ◽  
High Temperature Superconductor ◽  
High Temperature Superconductors ◽  
Usual Method ◽  
New Method ◽  
Relaxation Data ◽  
J Curve ◽  
Different Temperatures

An implicit expression for the time dependence of the current density J(t) is derived without the constant assumption of dU/dJ or <dU/dJ>, based on which a new method to extract U(J) relationship from magnetic relaxation data in high temperature superconductors is described. This method is applied to a melt textured growth YBa2Cu3O6+x sample and we obtain U(J)~ J-μ with μ=0.90 for H‖c, which is in accordance with that derived by the usual method suggested by Malery et al.(μ=0.87). Moreover, both methods give the same value of the constant C, which implies that the determination of C by the requirement of continuity of the U(J) curve at different temperatures is reliable. And the results U(J)~ J-μ by both methods are evidence for the collective pinning or the vortex glass theory.

The determination of rigid-body translation vectors of twins with nearly common reflections

1994 ◽  
Vol 52 ◽  
pp. 730-731
Author(s):  
D. J. Seale ◽  
S. S. Sheinin
Keyword(s):  
High Temperature ◽  
Rigid Body ◽  
Twin Boundary ◽  
High Temperature Superconductor ◽  
Translation Vector ◽  
Bravais Lattice ◽  
Higher Symmetry ◽  
Transformation Twins ◽  
Symmetry Structure

A method has previously been reported in the literature for determining the rigid body translation vector of a twin boundary using diffraction contrast. The technique relies on imaging the twin boundary with a reflection which is common to the two crystals on either side of the boundary. In order to completely define the rigid body translation vector, at least three such common reflections must be used. This procedure can become extremely difficult, however, in the case of crystals which have an element of pseudo-symmetry. These are crystals which have a Bravais lattice which is slightly distorted from a different Bravais lattice of higher symmetry. An example of this kind of crystal is the high temperature superconductor, Y1Ba2Cu3O7-δ. This material has a unit cell which is orthogonal, but which is only slightly different from tetragonal, with a=3.82 Å and b=3.89 Å. Crystals of this type often exhibit transformation twins which are formed when the crystal is transformed from the higher to the lower symmetry structure during cooling.

Measurement of the dynamic error rate of a high temperature superconductor rapid single flux quantum comparator

1998 ◽  
Vol 72 (18) ◽  
pp. 2328-2330 ◽  
Author(s):  
B. Ruck ◽  
B. Oelze ◽  
R. Dittmann ◽  
A. Engelhardt ◽  
E. Sodtke ◽  
...  
Keyword(s):  
High Temperature ◽  
Error Rate ◽  
High Temperature Superconductor ◽  
Dynamic Error ◽  
Flux Quantum ◽  
Rapid Single Flux Quantum

Determination of oxygen in the new high-temperature superconductor HgBa2CuO4+x

1994 ◽  
Vol 350 (12) ◽  
pp. 718-719 ◽  
Author(s):  
G. N. Maso ◽  
V. M. Ivanov ◽  
A. V. Kumkova
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor

scholarly journals Determination of the Formation of the 1/6[031] Extrinsic Stacking Faults in Deformed YBa2Cu3O7−δ

1990 ◽  
Vol 183 ◽  
Author(s):  
M. J. Kramer ◽  
E. P. Kvam ◽  
L. S. Chumbley
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor ◽  
Stacking Faults ◽  
Stacking Fault ◽  
Processing Conditions ◽  
Partial Dislocations ◽  
Transmission Electron ◽  
Edge Dislocations ◽  
Image Simulations

AbstractMechanial deformation of the YBa2Cu3O7−δ high temperature superconductor under a number of different processing conditions resulted in the formation of <100> and <110> edge dislocations, both having a (001) slip plane. Subsequent high temperature annealing at 900°C resulted in the formation of extrinsic stacking faults with a large separation of the partial dislocations, up to 0.35 μm, suggesting a very low minimum stacking fault energy of 1.2 × 10−2 J/m2. High resolution transmission electron microscopy (HRTEM) in conjunction with image simulations revealed that the stacking faults were comprised of an extra CuO plane between the Ba layers with an offset of b/2. The stacking fault vector of 1/6[031] requires some separation of the <010> Burgers vectors into the c-axis direction. A model in which [010] separates into 1/6[031] + 1/[031] is consistent with the observed stacking faults.

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