Hysteretic Phenomena in the Critical Current of High-Tc Superconductors

1997 ◽  
Vol 11 (26n27) ◽  
pp. 1133-1151 ◽  
Author(s):  
V. M. Svistunov ◽  
T. Aomine ◽  
T. Fukami ◽  
T. Yamamoto ◽  
A. I. D'Yachenko
Keyword(s):  
Magnetic Fields ◽  
Critical Current ◽  
Surface Current ◽  
Weak Links ◽  
High Magnetic Fields ◽  
High Tc Superconductors ◽  
High Tc ◽  
Model Based ◽  
Granular Superconductors ◽  
Grain Surface

Models describing the appearance of an abnormal hysteresis in the critical current of granular superconductors are analyzed. It has been revealed that the most suitable for High T c Superconductors ( H T c S ) is a model based on an irreversibility of the grain surface current that determines the critical current of the Josephson weak links or depairing current of narrow superconducting part in ( H T c S ) oxides. This leads to the irreversibility phenomena in ( H T c S ) at the high magnetic fields H≫ H c1 .

PRESSURE EFFECTS ON HIGH-Tc SUPERCONDUCTORS CURRENT TRANSFER

1991 ◽  
Vol 05 (20) ◽  
pp. 3255-3265 ◽  
Author(s):  
V.M. SVISTUNOV ◽  
A.I. D’YACHENKO ◽  
V. YU. TARENKOV
Keyword(s):  
Magnetic Field ◽  
High Pressure ◽  
Magnetic Fields ◽  
Pressure Effects ◽  
High Magnetic Fields ◽  
Magnetic Field Direction ◽  
Current Transfer ◽  
High Tc Superconductors ◽  
High Tc ◽  
The Magnetic Field

The efficiency of high pressure technique for the evidence of the Josephson nature of the intergranular contacts in metal ceramics has been demonstrated. With this technique it has been found that the abnormal hysteresis in fields of the order of tens kOe was not connected with the short-circuited contacts between the granules. The reason for the hysteresis lies in the ambiguity of the magnetization of the granules versus the change in the magnetic field direction. The critical current stability of the Josephson conteacts to high magnetic fields is due to both the inhomogeneity of the contacts and the existence of Abrikosov vortices within the superconducting electrode links.

Characterizing the pseudogap in the high-Tc superconductors using very high magnetic fields: implications on the phase diagram

2001 ◽  
Vol 364-365 ◽  
pp. 458-461 ◽  
Author(s):  
Guo-qing Zheng ◽  
H. Ozaki ◽  
Y. Kitaoka ◽  
W.G. Clark ◽  
Y. Kodama ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Fields ◽  
High Magnetic Fields ◽  
High Tc Superconductors ◽  
High Tc ◽  
Very High

Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-Tc superconductors

2000 ◽  
Vol 341-348 ◽  
pp. 819-822 ◽  
Author(s):  
Guo-qing Zheng ◽  
H. Ozaki ◽  
W.G. Clark ◽  
M. Sakai ◽  
Y. Kitaoka ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Magnetic Fields ◽  
High Tc Superconductors ◽  
High Tc ◽  
D Wave

Far-infrared magneto-absorption in epitaxial films of high-Tc superconductors at pulsed high magnetic fields up to 100 T

1994 ◽  
Vol 201 ◽  
pp. 266-270 ◽  
Author(s):  
Y. Shimamoto ◽  
T. Takamasu ◽  
N. Miura ◽  
M. Naito ◽  
N. Kubota ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Far Infrared ◽  
Epitaxial Films ◽  
High Magnetic Fields ◽  
High Tc Superconductors ◽  
High Tc

Anisotropic Vortex Dynamics Related to Screening Currents and Microwave Currents under Magnetic Fields on High Tc Superconductors

PIERS Online ◽  
2005 ◽  
Vol 1 (1) ◽  
pp. 110-114
Author(s):  
Tamio Endo ◽  
Hong Zhu ◽  
Takahisa Sakurada ◽  
Ajay K. Sarkar ◽  
Masanori Okada ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Vortex Dynamics ◽  
High Tc Superconductors ◽  
High Tc
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