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Structural, Magnetic, and Giant Dielectric Properties of Gd Substituted CuFeO2 Composites

  • Dewei Liu
  • Liuting Gu
  • Zhenping ChenEmail author
  • Haiyang Dai
  • Tao Li
  • Renzhong Xue
  • Xinyu Xie
  • Fengjiao Ye
  • Peng Yang
Original Paper
  • 17 Downloads

Abstract

To study the effects of structural modulation by doping rare earth element on the magnetic and dielectric properties, CuFe1-xGdxO2 (0 ≤ x ≤ 0.2) samples are synthesized using the solid-state reaction method. The XRD and SEM results show that a small amount of Gd3+ ions (x ≤ 0.07) effectively occupies the Fe3+ site and promotes the grain growth of the CuFeO2 system. Judging from the magnetic property measurements, the samples (x = 0, 0.01) undergo two successive magnetic transitions. Further increase of x, the magnetic transition of the samples (x ≥ 0.07) has not been detected in the testing temperature range. The magnetization hysteresis loops show that all of the samples have weak ferromagnetic properties, and the saturation magnetization is obviously enhanced with increasing x. Most interestingly, the dielectric measurements suggests that CuFeO2 samples exhibit a giant dielectric constant (εγ~104), and εγ is obviously improved (~ 4.0 × 104) using the proper Gd content. The dielectric properties are explained using the internal barrier layer capacitance model (IBLC).

Keywords

CuFeO2 ceramics Microstructure Magnetic property Giant dielectric property 

Notes

Funding Information

This work was supported by the National Natural Science Foundation of China (Project Nos. 11675149, 11775192) and the Graduates’ Scientific Research Foundation of Zhengzhou University of Light Industry (No. 2017051).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Dewei Liu
    • 1
  • Liuting Gu
    • 1
  • Zhenping Chen
    • 1
    Email author
  • Haiyang Dai
    • 1
  • Tao Li
    • 1
  • Renzhong Xue
    • 1
  • Xinyu Xie
    • 1
  • Fengjiao Ye
    • 1
  • Peng Yang
    • 1
  1. 1.School of Physics and Electronic EngineeringZhengzhou University of light industryZhengzhouChina

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