ACu3Ti4O12 and ACu3Ru4O12 perovskites:: high dielectric constants and valence degeneracy

被引：454

作者：

Subramanian, MA ^{[1
]}

Sleight, AW

机构：

[1] DuPont Cent R&D, Expt Stn, Wilmington, DE 19880 USA

[2] Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA

来源：

SOLID STATE SCIENCES | 2002年 / 4卷 / 03期

关键词：

D O I：

10.1016/S1293-2558(01)01262-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

ACu(3)M(4)O(12) phases crystallize in perovskite-related structure (space group: Im3). Dielectric constants for ACu(3)Ti(4)O(12) phases are found to be much higher than expected based on the dielectric polarizabilities of the constituent atoms, and this property seems not to be related to either underlying ferroelectric or relaxor behavior. New data on these compounds is presented. Valence degeneracy between Cu and Ru is shown to exist for ACu(3)Ru(4)O(12) phases where A may be a +1, +2, or +3 cation. Structural refinements based on single crystal X-ray diffraction data are given for CaCu3Ti4O12, CaCu3Ru4O12 and NaCu3Ru4O12. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.

引用

页码：347 / 351

页数：5

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