scholarly journals The Influence of the Singularity-Enhanced Density of States on the Isotope Effect in a Bond Asymmetric Model for a Cu-O Based High-Tc Superconductor

1990 ◽  
Vol 83 (3) ◽  
pp. 455-466 ◽  
Author(s):  
S. Seki ◽  
K. Tanabe
Keyword(s):  
Isotope Effect ◽  
Density Of States ◽  
High Tc ◽  
Asymmetric Model ◽  
High Tc Superconductor

Search for the Barium Isotope Effect in the High-Tc Superconductor YBa2Cu3O7-x

1988 ◽  
pp. 217-220
Author(s):  
A. Inyushkin ◽  
N. Babushkina ◽  
V. Florentiev ◽  
A. Kopylov ◽  
V. Ozhogin ◽  
...  
Keyword(s):  
Isotope Effect ◽  
High Tc ◽  
High Tc Superconductor ◽  
Barium Isotope

Tunneling Measurements of Density of States in Superconducting YBa2Cu3Oy

1987 ◽  
Vol 99 ◽  
Author(s):  
K.I Ida ◽  
K. Gotoh ◽  
H. Enomoto ◽  
Y. Takano ◽  
N. Mori ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Temperature Dependence ◽  
Density Of States ◽  
High Tc ◽  
Temperature Range ◽  
High Tc Superconductor

ABSTRACTTunneling measurements were applied to investigate the density of states of the high Tc superconductor in the temperature range from 4.2 K to the transition temperature. Several structures were found in conductance curves in higher bias region than ever reported, and they vanished around Tc. Temperature dependence of the bias voltages at which these structures appeared showed the BCS-like behavior.

High resolution STEM imaging study on high Tc superconductor YBa2CuaO7-x

1988 ◽  
Vol 46 ◽  
pp. 882-883
Author(s):  
H.-J. Ou ◽  
J. M. Cowley
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Grain Boundary ◽  
Strong Field ◽  
Imaging Study ◽  
Structure Defects ◽  
High Tc ◽  
High Tc Superconductor ◽  
Diffraction Patterns ◽  
Lattice Planes

Using the dedicate VG-HB5 STEM microscope, the crystal structure of high Tc superconductor of YBa2Cu3O7-x has been studied via high resolution STEM (HRSTEM) imaging and nanobeam (∽3A) diffraction patterns. Figure 1(a) and 2(a) illustrate the HRSTEM image taken at 10' times magnification along [001] direction and [100] direction, respectively. In figure 1(a), a grain boundary with strong field contrast is seen between two crystal regions A and B. The grain boundary appears to be parallel to a (110) plane, although it is not possible to determine [100] and [001] axes as it is in other regions which contain twin planes [3]. Following the horizontal lattice lines, from left to right across the grain boundary, a lattice bending of ∽4° is noticed. Three extra lattice planes, indicated by arrows, were found to terminate at the grain boundary and form dislocations. It is believed that due to different chemical composition, such structure defects occur during crystal growth. No bending is observed along the vertical lattice lines.

Electron-Probe Quantitative Energy-Dispersive Analysis of Trace Magnesium Concentrations in Ag-Mg Alloys

1996 ◽  
Vol 54 ◽  
pp. 510-511
Author(s):  
R. B. Marinenko
Keyword(s):  
Electron Probe ◽  
Energy Dispersive Spectrometry ◽  
Mg Alloys ◽  
Energy Dispersive ◽  
Energy Dispersive Analysis ◽  
High Tc ◽  
Alloy Wire ◽  
High Tc Superconductor ◽  
Eds Analysis ◽  
Superior Mechanical Properties

Internally oxidized Ag-Mg alloys are used as sheaths for high Tc superconductor wires because of their superior mechanical properties. The preparation and characteristics of these materials have been reported. Performance of the sheaths depends on the concentration of the magnesium which generally is less than 0.5 wt. percent. The purpose of this work was to determine whether electron probe microanalysis using energy dispersive spectrometry (EDS) could be used to quantitate three different Ag-Mg alloys. Quantitative EDS analysis can be difficult because the AgL escape peak occurs at the same energy (1.25 keV) as the Mg Kα peak. An EDS spectrum of a Ag-Mg alloy wire is compared to a pure Ag spectrum in Fig. 1.

Evidence for magnetic organization of high Tc superconductor YBa 2 Cu8O7 observed by neutron diffraction

1987 ◽  
Vol 48 (10) ◽  
pp. 1623-1625 ◽  
Author(s):  
B. Farnoux ◽  
R. Kahn ◽  
A. Brulet ◽  
G. Collin ◽  
J.P. Pouget
Keyword(s):  
Neutron Diffraction ◽  
High Tc ◽  
High Tc Superconductor

Synthesis of One-dimensional Nano-sized Defects in High Tc Superconductor

2006 ◽  
Author(s):  
In-Gann Chen ◽  
Maw-Kuen Wu ◽  
Shih-Yun Chen
Keyword(s):  
High Tc ◽  
One Dimensional ◽  
High Tc Superconductor
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