Dielectric properties of Gd2CuO4

J. B. Shi, Y. Hsu, C. T. Lin

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The complex dielectric response of the Gd2CuO4 samples measured from 20 Hz to 1 MHz and from 20 K to 300 K reveals very high real part of the dielectric constant ε′ > 104 at 300 K and > 5 × 103 above 200 K. The large polarizability results from a thermally activated process with a very small activation energy of 0.065 eV and extra additional polarization. We observed one frequency-dependent and one frequency-independent peak in dissipation factor D(T, ω) curves and corresponding features in imaginary part of the dielectric constant ε″ curves. The first peak occurs at T ∼ 230 K and is thought to be due to the occurrence of antiferromagnetic transition in the sample and the second one occurs over the range of 50 to 120 K and is related to the change of conductivity mechanism.

Original languageEnglish
Pages (from-to)272-278
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume299
Issue number3-4
DOIs
Publication statusPublished - 1998 Apr 20

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Keywords

  • Dielectric properties
  • GdCuO
  • Polarizability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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