PHASE-SEPARATION IN YBA2CU3O7-DELTA SINGLE-CRYSTALS NEAR DELTA=0

被引：77

作者：

CLAUS, H

GEBHARD, U

LINKER, G

ROHBERG, K

RIEDLING, S

FRANZ, J

ISHIDA, T

ERB, A

MULLERVOGT, G

WUHL, H

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST NUKL FESTKORPERPHYS,W-7500 KARLSRUHE 1,GERMANY

[2] UNIV KARLSRUHE,FAK PHYS,W-7500 KARLSRUHE,GERMANY

来源：

PHYSICA C | 1992年 / 200卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(92)90377-O

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

X-ray diffraction, resistivity, AC and DC magnetization data on high-quality single crystals of YBa2Cu3O7-delta are presented. We demonstrate that for delta < 0.08, the (001) diffraction lines are split into two, indicating that at these high oxygen concentrations the crystals are no longer single phase but actually consist of two (or more) different phases with slightly different c-axis parameters. In the two-phase region, the electrical resistivity and the AC and DC magnetic susceptibilities show a broadening of the superconducting transition. This broadening is thought to be due to the proximity effect or strains in two finely dispersed phases with slightly different transition temperatures.

引用

页码：271 / 276

页数：6

共 16 条

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