REDUCED RESISTIVITY ANISOTROPY RATIO IN BI2SR2CACU2O8 SINGLE-CRYSTALS SHOWING ZERO RESISTANCE AT 97-K

被引：14

作者：

BADECHE, T

MONNEREAU, O

GHORAYEB, AM

GRACHEV, V

BOULESTEIX, C

机构：

[1] FAC SCI & TECH ST JEROME,MATOP LAB,CNRS,ERS 14,CASE 151,F-13397 MARSEILLE 20,FRANCE

[2] UNIV AIX MARSEILLE 1,CTR ST CHARLES,PHYSICOCHIM MAT LAB,F-13331 MARSEILLE 3,FRANCE

来源：

PHYSICA C | 1995年 / 241卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)00626-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this article, we report resistivity results on single crystals of Bi-2212 with a composition very close to the standard one and with a Sr/Ca ratio close to 2. We confirm the metallic temperature dependence of rho(c) that has been recently noted by other authors, and report a room-temperature resistivity ratio, rho(c)/rho(ab), of the order of 170, a rather small value, indicative of good metallic behaviour. In addition, we find an anomaly in the resistivity-versus-temperature curves, centered around 240 K. We also report a T(c)(0) as high as 97 K, the highest T(c)(0) reported so far for Bi-2212. Apart from the 240 K anomaly which remains to be clearly understood, the other observations are tentatively interpreted in terms of band theory and of the interlayer coupling in these samples.

引用

页码：10 / 16

页数：7

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