Separation of grain boundary effects and intrinsic properties in perovskite-like Gd0.6Y0.4BaCo2O5.5 using high-frequency dielectric spectroscopy -: art. no. 184403

被引：22

作者：

Bobnar, V ^{[1
]}

Lunkenheimer, P ^{[1
]}

Paraskevopoulos, M ^{[1
]}

Loidl, A ^{[1
]}

机构：

[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.65.184403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dielectric response of Gd0.6Y0.4BaCo2O5.5, which undergoes a sequence of magnetic and electronic phase transitions, has been investigated in the radio-frequency range from 1 MHz to 1.8 GHz in order to separate the intrinsic properties from grain boundary and sample-electrode interface effects. Analysis of the measured response, showing the characteristics of a damped resonator, reveals the intrinsic dc resistivity, which cannot be detected using the standard four-point measurement method. From the skin-effect-governed dielectric response the temperature dependence of the magnetic permeability was determined.

引用

页码：1 / 5

页数：5

共 22 条

[1]

BOHMER R, 1989, J APPL PHYS, V65, P901, DOI 10.1063/1.342990

[2] THE DIELECTRIC ANOMALY AS THE INSULATOR-METAL TRANSITION IS APPROACHED FROM THE INSULATING SIDE [J].