Surface and intrinsic low frequency conductivity of KTiOPO4 (KTP)in the temperature range 290-1100 K.

被引：9

作者：

Pimenov, A

Ruscher, CH

Maslov, VA

机构：

[1] UNIV HANNOVER,INST MINERAL,D-30167 HANNOVER,GERMANY

[2] RUSSIAN ACAD SCI,INST GEN PHYS,MOSCOW,RUSSIA

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 97卷 / 11期

关键词：

ferroelectrics; surfaces and interfaces; dielectric response;

D O I：

10.1016/0038-1098(95)00801-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The ac conductivity and dielectric function of KTiOPO4 were measured in the frequency range from 10 Hz to 10 MHz and in the temperature range from 290 to 1100 K, using Au evaporated contacts. Strong low frequency relaxation after field annealing experiments up to 600-1100K is observed, which can be attributed to surface segregation. Conclusively, by removal of the surface layers, intrinsic low frequency behavior is retained. The conductivity spectra indicate a power law behavior sigma(omega)similar to omega(s) with a quite small exponent s(tx)0.17. This dependence is possibly caused by the one dimensional character of AC conductivity.

引用

页码：913 / 917

页数：5

共 14 条

[1] ELECTROOPTIC AND DIELECTRIC-PROPERTIES OF KTIOPO4 [J].