AC susceptibility of high Tc superconductor Tl0.8Pb0.2Bi0.2Sr1.6Ba0.4Ca2Cu3Ox using a critical state model

2001 ◽  
Vol 350 (1-2) ◽  
pp. 83-87 ◽  
Author(s):  
J.H. Lee ◽  
Y.C. Kim ◽  
B.J. Kim ◽  
D.Y. Jeong
Keyword(s):  
Critical State ◽  
Ac Susceptibility ◽  
Critical State Model ◽  
State Model ◽  
High Tc ◽  
High Tc Superconductor

On the applicability of the critical state model to the description of electromagnetic properties of high-Tc superconductors

1993 ◽  
Vol 206 (3-4) ◽  
pp. 195-201 ◽  
Author(s):  
L.M. Fisher ◽  
N.V. Il'in ◽  
I.F. Voloshin ◽  
N.M. Makarov ◽  
V.A. Yampol'skii ◽  
...  
Keyword(s):  
Critical State ◽  
Critical State Model ◽  
State Model ◽  
Electromagnetic Properties ◽  
High Tc Superconductors ◽  
High Tc

THE Ni INFLUENCE ON THE INTERGRANULAR PROPERTIES OF BULK (Bi,Pb):2223 SUPERCONDUCTOR

1999 ◽  
Vol 13 (11) ◽  
pp. 371-378 ◽  
Author(s):  
A. V. POP
Keyword(s):  
Linear Dependence ◽  
Critical State ◽  
Ac Susceptibility ◽  
Field Amplitude ◽  
Critical State Model ◽  
State Model ◽  
Force Density ◽  
Pinning Force ◽  
Ac Field ◽  
Pinning Force Density

The effect of Ni 3+ ions on the intergranular T p temperature of the imaginary peaks of the ac susceptibility has been studied for a (Bi,Pb):2223 superconductor. The linear dependence of T p as a function of ac field amplitude agree with Muller critical state model. The Ni 3+ ions induced an increase of intergranular pinning force density. J cJ (T) dependence near T c agrees with the assumption of SNS intergrain junctions.

A.C. susceptibility and magnetization of high-Tc superconductors: Critical state model for the intergranular region

1989 ◽  
Vol 157 (3) ◽  
pp. 425-430 ◽  
Author(s):  
V. Calzona ◽  
M.R. Cimberle ◽  
C. Ferdeghini ◽  
M. Putti ◽  
A.S. Siri
Keyword(s):  
Critical State ◽  
Critical State Model ◽  
State Model ◽  
High Tc Superconductors ◽  
High Tc

On the Determination of Intrinsic Properties of Ceramic High-Tc Superconductors by Ac Susceptibility Measurements

1992 ◽  
Vol 275 ◽  
Author(s):  
F. Ludwig
Keyword(s):  
Sample Size ◽  
Critical State ◽  
Ac Susceptibility ◽  
Field Amplitude ◽  
Critical State Model ◽  
State Model ◽  
Critical Fields ◽  
Current Densities ◽  
Ac Field

ABSTRACTVarious models have been proposed to interpret ac susceptibility curves measured on sintered high-To superconductors (HTSC) and to deduce parameters like critical current densities and critical fields. To get more clearness, systematic studies of position and height of the intergranular maximum in χ'' have been performed on several ceramic HTSC samples in dependence of both ac field amplitude and sample size. In the present paper, the data are used to discuss the various models proposed in the literature. It is shown that modifications of the critical state model using incorrect jc(Hi) functions as well as other interpretations of the χ'' peak yield not actually intrinsic but sample size and geometry dependent parameters. The dependence of both position and height of the intergranular maximum in χ '' on ac field amplitude and sample size can be explained in the framework of a modified critical state model using a power law for the jc(Hi) dependence.

Generalized critical state model in high-Tc superconductors

Cryogenics ◽  
1997 ◽  
Vol 37 (8) ◽  
pp. 421-430 ◽  
Author(s):  
K. Yamafuji ◽  
T. Wakuda ◽  
T. Kiss
Keyword(s):  
Critical State ◽  
Critical State Model ◽  
State Model ◽  
High Tc Superconductors ◽  
High Tc

Critical state model and the magnetic behaviour of high Tc superconductors

Cryogenics ◽  
1989 ◽  
Vol 29 (9) ◽  
pp. 907-914 ◽  
Author(s):  
P. Chaddah ◽  
G. Ravi Kumar ◽  
A.K. Grover ◽  
C. Radhakrishnamurty ◽  
G.V. Subba Rao
Keyword(s):  
Critical State ◽  
Magnetic Behaviour ◽  
Critical State Model ◽  
State Model ◽  
High Tc Superconductors ◽  
High Tc
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