Studies on the dielectric properties and structural phase transition of K2SO4 crystal

R. H. Chen*, R. J. Wang, T. M. Chen, C. S. Shern

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

43 引文 斯高帕斯(Scopus)

摘要

Electrical complex impedance measurements were carried out on K2SO4 single crystal. The temperature and frequency dependence of electrical conductivity, dielectric constant, and the electrical modulus were determined. The increase in conductivity with rise in temperature showed the superionic nature of the sample in the high-temperature phase. The results also show that the temperature dependence of AC conductivity and conduction relaxation time approximately follows the Arrhenius relation. The activation energies and characteristic relaxation times were calculated. The AC conductivity as a function of frequency is well described by σ(ω) = σ(0)+Aω+s$/. Here σ(0) is the DC conductivity, and s is the fitting parameter. Non-Debye dynamic conduction was observed in the sample crystal. The obtained values of s decrease with increasing temperature, from 1.27 to 0.61 and 0.43 to 0.28 in the room-temperature phase and in the high-temperature phase, respectively. This effect is attributed to the interaction of the mobile ions with the SO4 groups in the K2SO4 single crystal.

原文英語
頁(從 - 到)519-527
頁數9
期刊Journal of Physics and Chemistry of Solids
61
發行號4
DOIs
出版狀態已發佈 - 2000 4月

ASJC Scopus subject areas

  • 化學 (全部)
  • 材料科學(全部)
  • 凝聚態物理學

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