Structural, bulk permittivity and impedance spectra of electronic material: Bi(Fe0.5La0.5)O3

  • Nripesh Kumar
  • Alok ShuklaEmail author
  • Nitin Kumar
  • Sugato Hajra
  • Sushrisangita Sahoo
  • R. N. P. Choudhary


In the present paper, fabrication and characterization (structural, electrical and ferroelectric properties) of a lead-free lanthanum (La) modified bismuth ferrite electroceramic having composition Bi(Fe0.5La0.5)O3 (BFLO) using various experimental techniques have been reported. BFLO has been synthesized by means of a high-temperature inter-diffusion of oxides method. This investigation mainly aims to correlate the phase formation and physical properties while the Fe-site of bismuth ferrite has partially been replaced by La. The surface micrograph shows the formation of the high dense ceramic sample. Analysis of data of various complex spectroscopies related to modulus and impedance exhibits the relaxation mechanism in this sample is of non-Debye type. The combined effect of grains and grain boundaries has been depicted from the Nyquist plot through the least-squares fitting of suitable circuit model along with the experimental data. The remnant polarization and coercive field decreases as temperature rises which was discerned from the ferroelectric loop obtained at different temperatures. The existence of ferroelectric nature in the sample was postulated from the polarization versus electric field plot.



The authors like to acknowledge Dr. K Mohanta, IIT-BHU for SEM experiment. This work is financial supported by Science and Engineering Research Board, Department of Science and Technology (SERB-DST), Government of India, in the form of Research Project (No. EMR/2015/002420) to the author Alok Shukla.


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Authors and Affiliations

  • Nripesh Kumar
    • 1
  • Alok Shukla
    • 1
    Email author
  • Nitin Kumar
    • 1
  • Sugato Hajra
    • 2
  • Sushrisangita Sahoo
    • 3
  • R. N. P. Choudhary
    • 3
  1. 1.Department of PhysicsNational Institute of Technology MizoramAizawlIndia
  2. 2.Department of Electronics and Instrumentation EngineeringSiksha O Anusandhan (Deemed to be University)BhubaneswarIndia
  3. 3.Department of PhysicsSiksha O Anusandhan (Deemed to be University)BhubaneswarIndia

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