MEASUREMENTS OF THE ELECTRIC-FIELD GRADIENT AT CADMIUM IN THE HIGH-TC SUPERCONDUCTOR YBA2CU3O6+X

被引：4

作者：

PLANK, H ^{[1
]}

BAUER, O ^{[1
]}

FORKEL, D ^{[1
]}

MEYER, F ^{[1
]}

ROAS, B ^{[1
]}

SAEMANNISCHENKO, G ^{[1
]}

STROBEL, J ^{[1
]}

WOLF, H ^{[1
]}

WITTHUHN, W ^{[1
]}

机构：

[1] SIEMENS AG,FORSCHUNGSLAB,W-8520 ERLANGEN,GERMANY

来源：

HYPERFINE INTERACTIONS | 1990年 / 61卷 / 1-4期

关键词：

D O I：

10.1007/BF02407590

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The electric field gradient (EFG) at111Cd probe atoms in YBa2Cu3O6+x has been studied by the perturbed angular correlation (PAC) spectroscopy. After annealing at temperatures below 1000 K the probe atoms are located at the Cu(1) site; above 1100 K they preferentially occupy the Y site, whereas in the intermediate temperature range they also reside on the Ba site. A reduction of the oxygen content from x=1.0 to 0.2 resulted in a decrease of the asymmetry parameter measured at the Ba site, but in an increase of it at the Y site, indicating there a local distortion of the YBa2Cu3O6+x lattice by the Cd impurity. Two different surroundings for the Cd atoms at the Cu(1) site were observed. © 1990 J.C. Baltzer A.G., Scientific Publishing Company.

引用

页码：1139 / 1142

页数：4

共 6 条

[1]

BARTOS A, 1989, UNPUB EUROPHYSICS LE

[2] INFLUENCE OF OXYGEN STOICHIOMETRY ON THE STRUCTURE AND SUPERCONDUCTING TRANSITION-TEMPERATURE OF YBA2CU3OX [J].