scholarly journals Comparison Study of Transition Temperature between the Superconducting Compounds Tl0.9 Pb0.1 Ba2Ca2Cu3O9-δ, Tl0.9Sb0.1Ba2Ca2Cu3O9-δ and Tl0.9Cr0.1Ba2Ca2Cu3O9-δ

2014 ◽  
Vol 55 ◽  
pp. 336-341 ◽  
Author(s):  
Kareem Ali Jasim ◽  
Sameer Atta Makki ◽  
Alia abud Almohsin
Keyword(s):  
Transition Temperature ◽  
Comparison Study ◽  
Superconducting Compounds

Possibilities to increase the transition temperature of superconducting compounds

1988 ◽  
Vol 153-155 ◽  
pp. 1185-1186 ◽  
Author(s):  
V.A. Moskalenko ◽  
L.Z. Kon ◽  
M.E. Palistrant
Keyword(s):  
Transition Temperature ◽  
Superconducting Compounds

HIGH PRESSURE STUDY OF La3Ni2B2Nx

1995 ◽  
Vol 09 (11n12) ◽  
pp. 731-736
Author(s):  
Y. CAO ◽  
R. L. MENG ◽  
C. W. CHU
Keyword(s):  
High Pressure ◽  
Transition Temperature ◽  
Superconducting Transition Temperature ◽  
Pressure Effect ◽  
Nominal Composition ◽  
Superconducting Transition ◽  
Superconducting Compounds ◽  
High Pressure Study

The pressure effect on the superconducting transition temperature (T c ) of the newly discovered compound with a nominal composition La 3 Ni 2 B 2 N x with a T c ~14 K has been determined up to 1.5 GPa. T c was found to decrease linearly at a rate of –0.9 K/GPa, which is much greater than that of similar superconducting compounds, LuNi 2 B 2 C and Lu 2 Ni 2 B 2 C 2, while the compound resistivity remains unchanged. Reasons for the observation remain unknown.

In situ Tensile Experiments at Low Temperatures on Niobium Single Crystals by H.V.E.M.

1975 ◽  
Vol 33 ◽  
pp. 58-59
Author(s):  
F. H. Louchet ◽  
L. P. Kubin
Keyword(s):  
Electron Microscope ◽  
Transition Temperature ◽  
Low Temperature ◽  
Slip System ◽  
Low Temperatures ◽  
Tensile Axis ◽  
Image Intensifier ◽  
Screw Dislocations ◽  
Source Operation

Experiments have been carried out on the 3 MeV electron microscope in Toulouse. The low temperature straining holder has been previously described Images given by an image intensifier are recorded on magnetic tape.The microtensile niobium samples are cut in a plane with the two operative slip directions [111] and lying in the foil plane. The tensile axis is near [011].Our results concern:- The transition temperature of niobium near 220 K: at this temperature and below an increasing difference appears between the mobilities of the screw and edge portions of dislocations loops. Source operation and interactions between screw dislocations of different slip system have been recorded.

The structure of membranes and membrane proteins embedded in amorphous ice

1992 ◽  
Vol 50 (1) ◽  
pp. 432-433
Author(s):  
Uwe Lücken ◽  
Joachim Jäger
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Membrane Proteins ◽  
Phase Transition Temperature ◽  
Lipid Vesicles ◽  
Freezing Stress ◽  
Amorphous Ice ◽  
Different Temperatures ◽  
Band Pass ◽  
Lipid Polymorphism

TEM imaging of frozen-hydrated lipid vesicles has been done by several groups Thermotrophic and lyotrophic polymorphism has been reported. By using image processing, computer simulation and tilt experiments, we tried to learn about the influence of freezing-stress and defocus artifacts on the lipid polymorphism and fine structure of the bilayer profile. We show integrated membrane proteins do modulate the bilayer structure and the morphology of the vesicles.Phase transitions of DMPC vesicles were visualized after freezing under equilibrium conditions at different temperatures in a controlled-environment vitrification system. Below the main phase transition temperature of 24°C (Fig. 1), vesicles show a facetted appearance due to the quasicrystalline areas. A gradual increase in temperature leads to melting processes with different morphology in the bilayer profile. Far above the phase transition temperature the bilayer profile is still present. In the band-pass-filtered images (Fig. 2) no significant change in the width of the bilayer profile is visible.

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