CRYSTAL-STRUCTURE AND VALENCY PROPERTIES OF SUPERCONDUCTING PHASES OF BA (PB, BI, SB)O3 PEROVSKITES

被引：12

作者：

BENTE, K

BLUM, W

GAEBEL, R

PEBLER, J

SCHMIDBEURMANN, P

机构：

[1] UNIV MARBURG,INST ANORGAN CHEM,W-3550 MARBURG,GERMANY

[2] UNIV KIEL,INST MINERAL PETROG,W-2300 KIEL 1,GERMANY

来源：

PHYSICA C | 1992年 / 202卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(92)90183-D

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

At 800-850-degrees-C in air the Ba(Sb, Bi, Pb)O3 system is pseudo-ternary showing an extended solid solution series in the inner part. In the binary section between the two superconducting perovskites BaPb0.75Bi0.25O3 and BaPb0.75Sb0.25O3 an increasing Sb-content is correlated with a decreasing T(c) and a transition from monoclinic to tetragonal symmetry. A single crystal study of a BaPb0.70Sb0.20Bi0.05O3 crystal showed that solid solution members with lower BaPbO3-content than those of the BaPb0.75(Sb, Bi)O3 intersection become cubic. Valency investigations on Sb in BaPb0.75 (Bi, Sb)0.25O3 and BaPb0.75Sb0.25O3 by Sb-121-Mossbauer spectroscopy confirmed the valency of Sb to be 5+ independently of composition.

引用

页码：379 / 384

页数：6

共 18 条

[1] DENSITY OF STATES AND ISOTOPE EFFECT IN BIO SUPERCONDUCTORS - EVIDENCE FOR NONPHONON MECHANISM [J].