Temperature Dependence of Positron Annihilation Parameters in High Temperature Superconductors

1992 ◽  
Vol 105-110 ◽  
pp. 477-484 ◽  
Author(s):  
C.S. Sundar ◽  
A. Bharathi ◽  
Yan Ching Jean ◽  
W.Y. Ching ◽  
X. Lu ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Positron Annihilation ◽  
High Temperature Superconductors

TEMPERATURE DEPENDENCE OF THE HALL EFFECT IN La2−xSrxCuO4 AND ABa2Cu3O7 (A=Y, Gd) HIGH TEMPERATURE SUPERCONDUCTORS

1987 ◽  
Vol 01 (03n04) ◽  
pp. 1067-1070 ◽  
Author(s):  
M. Petravić ◽  
A. Hamzić ◽  
B. Leontić ◽  
L. Forró
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Hall Effect ◽  
Normal State ◽  
High Temperature Superconductors ◽  
The Other ◽  
Hall Constant ◽  
High Temperature Superconducting ◽  
Superconducting Ceramics ◽  
Hall Effect Measurements

We present Hall effect measurements in the normal state of the high temperature superconducting ceramics La2−xSrxCuO4 (x=0, 0.1, 0.15, 0.2, 0.25, 0.3), YBa2Cu3o7 and GdBa2Cu3O7 . The first family has temperature independent Hall constant for x>0, while in the other two systems RH is proportional to 1/T. From the Hall effect it follows that the transport in these compounds is hole-like.

POSSIBLE ANOMALOUS TEMPERATURE DEPENDENCES OF LONDON PENETRATION DEPTH IN THALLIUM AND BISMUTH HIGH-TEMPERATURE SUPERCONDUCTORS

1990 ◽  
Vol 04 (08) ◽  
pp. 525-529 ◽  
Author(s):  
A. I. BUZDIN ◽  
D. A. KUPTSOV ◽  
B. U. VUYICHIT'
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Penetration Depth ◽  
High Temperature Superconductors ◽  
Anomalous Temperature Dependence ◽  
London Penetration Depth ◽  
Anomalous Temperature ◽  
Temperature Dependences

Anomalous temperature dependence of London penetration depth is predicted in high-T c superconductors containing several inequivalent Cu-O layers.

Temperature Dependence of Total AC Loss in High-Temperature Superconducting Tapes

2009 ◽  
Vol 19 (4) ◽  
pp. 3637-3644 ◽  
Author(s):  
Doan N. Nguyen ◽  
Pamidi V. P. S. S. Sastry ◽  
David C. Knoll ◽  
Justin Schwartz
Keyword(s):  
Experimental Data ◽  
High Temperature ◽  
Temperature Dependence ◽  
High Temperature Superconductors ◽  
Ac Loss ◽  
Ac Losses ◽  
Transport Losses ◽  
Set Up ◽  
Interesting Behavior ◽  
The Magnetic Field

A versatile experimental facility was designed and set up to measure transport ac losses, magnetization ac losses, and total ac losses in high-temperature superconductors at variable temperatures. Several sets of measurements were carried out in the temperature range of 35 K to 100 K. Sample temperature during the measurements could be controlled within plusmn0.5 K of set temperature. Temperature dependence of transport losses reflects variation of critical current density of the tapes with temperature. Temperature dependence of magnetization losses exhibits an interesting behavior with a peak, whose position shifts to lower temperatures as the magnetic field is increased. Experimental data of ac losses at various temperatures are compared with those calculated using numerical methods. Generally, the simulated results reproduce well the experimental data.

Positron Annihilation Studies of High Temperature Superconductors

1990 ◽  
pp. 335-349 ◽  
Author(s):  
C. S. Sundar ◽  
A. Bharathi ◽  
Hao Liyang ◽  
Y. C. Jean ◽  
P. H. Hor ◽  
...  
Keyword(s):  
High Temperature ◽  
Positron Annihilation ◽  
High Temperature Superconductors
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