Investigation of the dielectric properties of bismuth pyrochlores

被引：282

作者：

Cann, DP

Randall, CA

Shrout, TR

机构：

[1] Materials Research Laboratory, Pennsylvania State University, University Park

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 100卷 / 07期

关键词：

spin glasses; ferroelectrics; dielectric response; phase transitions;

D O I：

10.1016/0038-1098(96)00012-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dielectric properties of polycrystalline bismuth-based pyrochlores of the general chemical form Bi-2(B2/32+B4/35+)O-7 and Bi-2(B3+B5+)O-7 where B2+ = Mg, Cu, Zn and Ni, B3+ = SC and In, and B5+ = Nb and Ta, were investigated as a function of temperature and frequency. At low temperatures (T similar to 100-150 K), a dielectric dispersion was universally observed within these systems. The dielectric dispersion was analyzed using phenomenological models often used for describing dipolar glass systems. Similar activation energies and pre-exponential damping frequencies are found to exist with dipolar glasses such as RADP (RbxH2PO4-(NH4)(1-x)H2PO4), K1-xLixTaO3, KBr1-xCNx and Kl(1-x)(NO2)(x). Copyright (C) 1996 Elsevier Science Ltd

引用

页码：529 / 534

页数：6

共 27 条

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