A model for the V-I characteristics in brick-wall-like structures

Author

Adamopoulos, N. ; Evetts, J.E.

Author_Institution

Dept. of Mater. Sci. & Metall., Cambridge Univ., UK

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1257

Lastpage

1260

Abstract

An analysis of brick-wall-like structures in high T/sub c/ polycrystalline ceramics with elongated grains is presented in order to predict and explain the voltage-current characteristics in these materials. The current path is determined by two different critical current densities in the direction of the long and short dimensions of the grains. The resistive transition and the n-values are studied in the limit of no longitudinal current transfer by using a statistical analysis of the distribution of the critical currents. This simple case illustrates the different aspects of the problem of modeling the general and more complicated structure.<>

Keywords

ceramics; critical current density (superconductivity); high-temperature superconductors; superconducting transition temperature; I-V characteristics; brick-wall-like structures; critical current densities; elongated grains; high temperature superconductors; polycrystalline ceramics; resistive transition; statistical analysis; voltage-current characteristics; Ceramics; Conductors; Critical current; Critical current density; Grain boundaries; Inorganic materials; Microstructure; Multifilamentary superconductors; Statistical analysis; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233396

Filename

233396