X-ray diffraction studies on YBa2Cu3O7-delta with Co substitution

被引：38

作者：

Wu, XS

Jiang, SS

Lam, CC

Wang, DW

Huang, XR

Wu, ZH

Xuan, Y

Jin, X

机构：

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

[2] INST HIGH ENERGY PHYS,BSRL,BEIJING 100039,PEOPLES R CHINA

[3] CITY UNIV HONG KONG,DEPT PHYS & MAT SCI,HONG KONG,HONG KONG

来源：

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1996年 / 157卷 / 02期

关键词：

D O I：

10.1002/pssa.2211570228

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ceramic samples of YBa2(Cu1-yCoy)(3)O(7-)delta with y = 0.00 to 0.08 were synthesized. These samples are free of impurity phases according to X-ray diffraction. The critical temperature T-c decreases with the increase of Co content. The orthorhombic-to-tetragonal transition occurs in the range of 0.02 < y < 0.04. Structural parameters, including the copper-oxygen bond lengths, vary smoothly with y within each phase but exhibit different behavior in the region from orthorhombic to tetragonal phase. These observations are consistent with a model in which superconducting behavior is controlled by charge transfer between the Cu(2)-O-2 sheets and Cu(1)-O chains, which act as reservoirs of charge.

引用

页码：439 / 447

页数：9

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