CATION DISTRIBUTION IN THE SUPERCONDUCTING TL, PB-1223 PHASE (TL0.5PB0.5SR2CA2CU3O9) FROM RESONANT SYNCHROTRON POWDER X-RAY-DIFFRACTION

被引：21

作者：

ARANDA, MAG ^{[1
]}

SINCLAIR, DC ^{[1
]}

ATTFIELD, JP ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND

来源：

PHYSICA C | 1994年 / 221卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90237-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The cation distribution in a polycrystalline sample of nominal composition ''Tl0.5Pb0.5Sr2Ca2Cu3O9'' with T(c) = 118 K has been determined from resonant synchrotron X-ray diffraction data collected at the Cu K, Tl L(III), Pl L(III) and Sr K edges. Cation disorder is found at all the non-copper sites according to the formula (Tl1-xPbx) (Sr2-yCay) (Ca2-zTlz) Cu3O9 where x = 0.53 (2), y = 0.42 (2) and z = 0.064 (4) for our sample. The overall composition Tl0.53Pb0.53Sr1.58Ca2.36Cu3O9 confirms that an excess of Ca and a deficiency of Sr can stabilise the Tl, Pb-1223 structure.

引用

页码：304 / 310

页数：7

共 10 条

[1]

ARANDA MAG, UNPUB PHYSICA C

[2] CALCULATION OF ANOMALOUS SCATTERING FACTORS AT ARBITRARY WAVELENGTHS [J].