X-RAY STUDIES OF THE YBA2CU3O6+X SUPERSTRUCTURES IN THE RANGE OF 0.40(3)LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.73(3)

被引：42

作者：

PLAKHTY, V

STRATILATOV, A

CHERNENKOV, Y

FEDOROV, V

SINHA, SK

LOONG, CK

GAULIN, B

VLASOV, M

MOSHKIN, S

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

[2] EXXON RES & ENGN CO,CORP RES,ANNANDALE,NJ 08801

[3] MCMASTER UNIV,HAMILTON L8S 4L8,ONTARIO,CANADA

[4] ST PETERSBURG UNIV,ST PETERSBURG 199034,USSR

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 84卷 / 06期

关键词：

D O I：

10.1016/0038-1098(92)90207-P

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By means of X-Ray diffraction on single crystals of YBa2Cu3O6+x with a well defined oxygen content it is shown that the ortho-II phase 2a0xb0 exists in the range of 0.40(3) less-than-or-equal-to x less-than-or-equal-to 0.63. The crystals with x = 0.70(3) and x = 0.73(3) possess the 3a0xb0 superstructure. Both are caused by a short-range ordering of the Cu(1)-oxygen and Cu(1)-vacancy chains. The antiparallel displacements a0x(y) = 0.011(1)angstrom, a0x(Ba) = -0.039(1)angstrom, c0z(Cu(2)) = 0.018(2)angstrom, and c0z0(1) = 0.049(7)angstrom are determined for the x = 0.58(2) by a profile refinement method.

引用

页码：639 / 644

页数：6

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