Inhomogeneous superconductivity in Bi2Sr2Ca1-xPrxCu2O8+δ

被引：36

作者：

dos Santos, CAM

Moehlecke, S

Kopelevich, Y

Machado, AS

机构：

[1] FAENQUIL, Dept Mat Engn, Grp Superconductividade, BR-12600000 Lorena, SP, Brazil

[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 390卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

Bi2Sr2Ca1-xPrxCu2O8+delta; superconducting critical temperature; percolation;

D O I：

10.1016/S0921-4534(02)02802-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied Pr doping effect on the superconducting transition temperature onset T-C(x) in Bi2Sr2Ca1-xPrxCu2O8+delta superconducting polycrystalline samples by means of both resistance R(T,x) and magnetization M(T,x) measurements. It is found that while the resistively determined T-CR (x) rapidly decreases with x for x > 0.4, the TCM approximate to 85 K obtained from magnetization measurements remains unchanged. We argue that the suppression of TCR(X) is related to the reduction of the sample superconducting volume fraction which ultimately leads to disconnected superconducting clusters. Resistive behavior measured at different applied currents in a sample close to percolation threshold supports this discussion. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：21 / 26

页数：6

共 24 条

[1] SYNTHESIS AND MAGNETISM OF BI(2)SR(2)RCU(2)O(8+DELTA) (R=Y, PR, AND TB) SYSTEMS [J].

AWANA, VPS ;

MENON, L ;

MALIK, SK .

PHYSICAL REVIEW B, 1995, 51 (14) :9379-9382

[2] SUPERCONDUCTIVITY AND RESISTIVITY STUDIES IN BI2SR2CA1-XMXCU2O8+Y (M=EU, DY, TM AND 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.6) [J].

AWANA, VPS ;

AGARWAL, SK ;

RAY, R ;

GUPTA, S ;

NARLIKAR, AV .

PHYSICA C, 1992, 191 (1-2) :43-51

[3] SUPERCONDUCTIVITY IN PR-DOPED AND CE-DOPED BI2CASR2CU2OY SYSTEMS [J].

AWANA, VPS ;

AGARWAL, SK ;

NARLIKAR, AV ;

DAS, MP .

PHYSICAL REVIEW B, 1993, 48 (02) :1211-1216

[4] PHASE-SEPARATION AND OXYGEN VARIATION IN PR-DOPED BI2SR2CACU2O8+DELTA [J].

CHEN, XL ;

LIANG, JK ;

MIN, JR ;

LI, JQ ;

RAO, GH .

PHYSICAL REVIEW B, 1994, 50 (05) :3431-3434

[5] Influence of Pr content on the kinetics of Bi2Sr2CaCu2O8+δ phase formation [J].

dos Santos, CAM ;

Pinto, GS ;

Ferreira, B ;

Machado, AJS .

PHYSICA C, 2001, 354 (1-4) :388-390

[6] METAL-INSULATOR-TRANSITION IN BI-PB-SR-CA-Y-CU-O CAUSED BY A CHANGE IN THE STRUCTURAL MODULATION [J].

FUKUSHIMA, N ;

YOSHIKI, M .

PHYSICAL REVIEW B, 1994, 50 (04) :2696-2699

[7] SUPERCONDUCTING AND MAGNETIC PHASE BOUNDARIES IN BI2SR2CA1-XMXCU2O8, WITH M = Y, GD, AND PR [J].

GAO, Y ;

PERNAMBUCOWISE, P ;

CROW, JE ;

OREILLY, J ;

SPENCER, N ;

CHEN, H ;

SALOMON, RE .

PHYSICAL REVIEW B, 1992, 45 (13) :7436-7443

[8] MODULATED STRUCTURE IN BI2SR2CA1-XYXCU2OY [J].

INOUE, Y ;

SHICHI, Y ;

MUNAKATA, F ;

YAMANAKA, M ;

KOYAMA, Y .

PHYSICAL REVIEW B, 1989, 40 (10) :7307-7309

[9] COMPOSITION, STRUCTURE, AND ELECTRICAL-PROPERTIES OF BI2SR2CA1-YYYCU2O8 - A SINGLE-CRYSTAL STUDY [J].

KENDZIORA, C ;

FORRO, L ;

MANDRUS, D ;

HARTGE, J ;

STEPHENS, P ;

MIHALY, L ;

REEDER, R ;

MOECHER, D ;

RIVERS, M ;

SUTTON, S .

PHYSICAL REVIEW B, 1992, 45 (22) :13025-13034

[10] CORRELATION BETWEEN TC AND HOLE CONCENTRATION IN THE CATION-SUBSTITUTED BI2SR2CACU2O8+-DELTA SYSTEM [J].

KOIKE, Y ;

IWABUCHI, Y ;

HOSOYA, S ;

KOBAYASHI, N ;

FUKASE, T .

PHYSICA C, 1989, 159 (1-2) :105-110

← 1 2 3 →