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Effect of Rare Earth Ions (R = Pr, Eu and Ho) on the Structural and Electrical Properties of Orthoferrites

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Abstract

The rare earth orthoferrites RFeO3 (R = Pr, Eu and Ho) were synthesized by the ceramic method. X-ray diffraction (XRD) was investigated to confirm the phase and orthorhombic structure with space group Pbnm. By varying rare earth ions, the lattice parameters and unit cell volume undergo non-monotonous changes. The slight shift in peaks towards higher 2θ for different R describes the lattice contraction, which is due to different ionic radii of the rare-earth ion in the samples. SEM (Scanning electron microscopy) micrographs reveal that the average grain size is lowest for HoFeO3. Dielectric studies reveal that the dielectric constant and dielectric loss decreases as the ionic radii of rare earth ion decreases. The ac conductivity shows that small polarons contribute to the conduction-mechanism.

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Acknowledgments

The authors are very thankful to Director Inter University Accelerator Center, New Delhi for providing the required experimental facilities.

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Authors and Affiliations

  1. Department of Physics, Central University of Kashmir, Tullamullah, Ganderbal, Jammu and Kashmir, 190015, India

    Khalid Sultan & Rubiya Samad

  2. Department of Physics, National Institute of Technology, Hazratbal, Srinagar, Jammu and Kashmir, 190006, India

    Shah Aarif Ul Islam & M. Ikram

  3. Department of School Education, Pattan, Jammu and Kashmir, 193121, India

    Mir Zubaida Habib

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  1. Khalid Sultan
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  2. Rubiya Samad
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  3. Shah Aarif Ul Islam
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  4. Mir Zubaida Habib
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Correspondence to Khalid Sultan.

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Sultan, K., Samad, R., Islam, S.A.U. et al. Effect of Rare Earth Ions (R = Pr, Eu and Ho) on the Structural and Electrical Properties of Orthoferrites. J. Electron. Mater. 48, 6003–6007 (2019). https://doi.org/10.1007/s11664-019-07334-z

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  • DOI: https://doi.org/10.1007/s11664-019-07334-z

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