REVIVAL OF SUPERCONDUCTIVITY IN Y0.4PR0.6BA2CU3O7-DELTA BY THE ISOVALENT SUBSTITUTION OF SR

被引：18

作者：

CAO, GH

QIAN, YT

LI, XJ

CHEN, ZY

WANG, CY

RUAN, KQ

QIU, YM

CAO, LZ

GE, YA

ZHANG, YH

机构：

[1] UNIV SCI & TECHNOL CHINA,STRUCT RES LAB,HEFEI 230026,PEOPLES R CHINA

[2] UNIV SCI & TECHNOL CHINA,DEPT PHYS,HEFEI 230026,PEOPLES R CHINA

[3] UNIV SCI & TECHNOL CHINA,DEPT MAT SCI & ENGN,HEFEI 230026,PEOPLES R CHINA

[4] CTR ADV STUDIES SCI & TECHNOL MICROSTRUCT,NANJING 210093,PEOPLES R CHINA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 23期

关键词：

D O I：

10.1088/0953-8984/7/23/002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polycrystalline samples of Y0.4Pr0.6Ba2-xSrxCu3O7-delta have been prepared and characterized by x-ray powder diffraction, differential thermal analysis, and temperature dependence of resistivity and AC susceptibility. We observed that both superconductivity and metallic conductivity were revived at x greater than or equal to 0.75, accompanied by an orthorhombic-to-tetragonal transition. The superconducting transition temperature could be further enhanced by increasing the Sr content, suggesting that there is an ion-size effect on T-c at the Ba site. The results were discussed in terms of the Pr-O covalent bonding effect.

引用

页码：L287 / L292

页数：6

共 14 条

[1] CAO G, IN PRESS J PHYS CHEM
[2] CAO GH, 1994, PHYS LETT A, V196, P263, DOI 10.1016/0375-9601(94)91237-8
[3] CAO GH, UNPUB CHINESE J LOW
[4] ELECTRONIC-STRUCTURE OF THE QUENCHED SUPERCONDUCTIVITY MATERIALS Y1-XPRXBA2CU3O7-DELTA
KANG, JS
ALLEN, JW
SHEN, ZX
ELLIS, WP
YEH, JJ
LEE, BW
MAPLE, MB
SPICER, WE
LINDAU, I
[J]. JOURNAL OF THE LESS-COMMON METALS, 1989, 148 (1-2): : 121 - 132
[5] VARIATION OF ANTIFERROMAGNETIC PR ORDERING IN THE TL(BA1-XSRX)2PRCU2O7-DELTA SYSTEM
LAI, CC
LEE, TJ
FUN, HK
KU, HC
HO, JC
[J]. PHYSICAL REVIEW B, 1994, 50 (06): : 4092 - 4096
[6] HYBRIDIZATION, HOLE LOCALIZATION AND PAIR BREAKING IN THE HIGH-TC SUPERCONDUCTING SYSTEM Y1-XPRXBA2CU3O7-DELTA
MAPLE, MB
LEE, BW
NEUMEIER, JJ
NIEVA, G
PAULIUS, LM
SEAMAN, CL
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1992, 181 : 135 - 152
[7] ON THE RARE-EARTH IONIC SIZE EFFECT IN THE R(1-X)PR(X)BA2CU3O(Y) SYSTEM (R = RARE-EARTH ELEMENT)
MUROI, M
STREET, R
[J]. PHYSICA C, 1994, 228 (3-4): : 216 - 226
[8] HOLE FILLING AND PAIR BREAKING BY PR IONS IN YBA2CU3O6.95+/-0.02
NEUMEIER, JJ
BJORNHOLM, T
MAPLE, MB
SCHULLER, IK
[J]. PHYSICAL REVIEW LETTERS, 1989, 63 (22) : 2516 - 2519
[9] RADOUSKY HB, 1992, J MATER RES, V7, P1918
[10] ROLE OF INTERNAL ELECTRIC-FIELD ON SUPPRESSION OF SUPERCONDUCTIVITY BY PR IN COPPER OXIDES
TANG, XX
MANTHIRAM, A
GOODENOUGH, JB
[J]. PHYSICA C, 1989, 161 (5-6): : 574 - 580

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