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

Revision of the Li–Si Phase Diagram: Discovery and Single-Crystal X-ray Structure Determination of the High-Temperature Phase Li4.11Si

2013 ◽  
Vol 25 (22) ◽  
pp. 4623-4632 ◽  
Author(s):  
Michael Zeilinger ◽  
Iryna M. Kurylyshyn ◽  
Ulrich Häussermann ◽  
Thomas F. Fässler
Keyword(s):  
Phase Diagram ◽  
High Temperature ◽  
Single Crystal ◽  
Structure Determination ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
X Ray

Synthesis and Structure Determination of the High Temperature Form of La2WO6

2011 ◽  
Vol 11 (11) ◽  
pp. 5105-5112 ◽  
Author(s):  
Mathieu Allix ◽  
Marie-Hélène Chambrier ◽  
Emmanuel Véron ◽  
Florence Porcher ◽  
Matthew Suchomel ◽  
...  
Keyword(s):  
High Temperature ◽  
Structure Determination ◽  
Temperature Form ◽  
High Temperature Form

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.

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