Nonrandom percolation behavior of grain boundary networks in high-Tc superconductors

被引：31

作者：

Frary, M ^{[1
]}

Schuh, CA ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 18期

关键词：

D O I：

10.1063/1.1624490

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The grain boundary networks of tetragonal and orthorhombic superconductors are shown to be nonrandom through computer simulations of polycrystalline structures. For biaxially textured microstructures, the distribution of low-angle grain boundaries around triple junctions is measurably deviant from the expectations for a randomly constructed lattice. Percolation thresholds are calculated for the unhindered flow of superconducting current through a polycrystal, and are found to be significantly different from the standard random percolation threshold in two dimensions. These deviations are explained as a result of crystallographic constraints on the network topology. (C) 2003 American Institute of Physics.

引用

收藏

页码：3755 / 3757

页数：3

相关论文

共 32 条

[21] Role of topological constraints on the statistical properties of grain boundary networks [J].

Minich, RW ;

Schuh, CA ;

Kumar, M .

PHYSICAL REVIEW B, 2002, 66 (05) :1-4

[22] Combination rule of Sigma values at triple junctions in cubic polycrystals [J].

Miyazawa, K ;

Iwasaki, Y ;

Ito, K ;

Ishida, Y .

ACTA CRYSTALLOGRAPHICA SECTION A, 1996, 52 :787-796

[23] Percolation analysis of the effect of tape length on the critical current density of 123 coated conductors [J].

Nakamura, Y ;

Izumi, T ;

Shiohara, Y .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 371 (04) :275-284

[24] CRITICAL CURRENTS IN INHOMOGENEOUS TRIANGULAR JOSEPHSON ARRAYS - A MODEL FOR POLYCRYSTALLINE SUPERCONDUCTORS [J].

NICHOLS, CS ;

CLARKE, DR .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (05) :995-1002

[25] Magneto-optical study of flux penetration and critical current densities in [001] tilt YBa2Cu3O7-delta thin-film bicrystals [J].

Polyanskii, AA ;

Gurevich, A ;

Pashitski, AE ;

Heinig, NF ;

Redwing, RD ;

Nordman, JE ;

Larbalestier, DC .

PHYSICAL REVIEW B, 1996, 53 (13) :8687-8697

[26] Percolation modelling for highly aligned polycrystalline superconducting tapes [J].

Rutter, NA ;

Glowacki, BA ;

Evetts, JE .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2000, 13 (11) :L25-L30

[27] Connectivity and percolation in simulated grain-boundary networks [J].

Schuh, CA ;

Minich, RW ;

Kumar, M .

PHILOSOPHICAL MAGAZINE, 2003, 83 (06) :711-726

[28] Analysis of grain boundary networks and their evolution during grain boundary engineering [J].

Schuh, CA ;

Kumar, M ;

King, WE .

ACTA MATERIALIA, 2003, 51 (03) :687-700

[29] Scaling of percolative current flow to long lengths in biaxially textured conductors [J].

Specht, ED ;

Goyal, A ;

Kroeger, DM .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2000, 13 (05) :592-597

[30] Resistor network model for simulation of current and flux percolation in granular coated conductors [J].

Zeimetz, B ;

Glowacki, BA ;

Evetts, JE .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 372 (PART 2) :767-770

← 1 2 3 4 →