Journal of Electroceramics

, Volume 34, Issue 2–3, pp 122–129

Dielectric and magnetic investigations of mixed cubic spinel Co-ferrites with controlled Mg content

  • Afaq H. Piracha
  • Shahid M. Ramay
  • Shahid Atiq
  • Saadat A. Siddiqi
  • Murtaza Saleem
  • Muhammad Sabieh Anwar
Article

DOI: 10.1007/s10832-014-9960-y

Cite this article as:
Piracha, A.H., Ramay, S.M., Atiq, S. et al. J Electroceram (2015) 34: 122. doi:10.1007/s10832-014-9960-y
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Abstract

High temperature frequency dependent dielectric properties, and room temperature magnetic behavior of mixed ferrites with controlled content of Mg in Co 1−xMg xFe 2O4(x=0.0,0.1,0.3,0.5,0.7,0.9 and 1.0) compositions are studied. Single phase spinel structure with cubic symmetry, lattice parameters, crystallite size, magnetic and dielectric properties were substantiated with x-ray diffractometer, transmission electron microscope, vibrating sample magnetometer and impedance analysis, respectively. Due to interfacial polarization, dielectric behavior of all the compositions shows dispersion with increase in frequency. The dielectric data was investigated by comparing the tangent loss and electric modulus for assigning the type and mechanism of dielectric relaxation. Temperature dependent dielectric constant, tangent loss and AC conductivity increase due to thermal activation of charge carriers and drift mobility. Furthermore, room temperature weak ferromagnetic behavior is observed due to the incorporation of non-magnetic Mg ions.

Keywords

Ferrites sol-gel Dielectric relaxation Stretching parameter 

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Afaq H. Piracha
    • 1
  • Shahid M. Ramay
    • 4
  • Shahid Atiq
    • 2
  • Saadat A. Siddiqi
    • 3
  • Murtaza Saleem
    • 1
  • Muhammad Sabieh Anwar
    • 1
  1. 1.School of Science and Engineering (SSE)Lahore University of Management Sciences (LUMS)LahorePakistan
  2. 2.Centre of Excellence in Solid State PhysicsUniversity of the Punjab, Quaid-e-Azam CampusLahorePakistan
  3. 3.Interdisciplinary Research Centre in Biomedical Materials (IRCBM)COMSATS Institute of Information TechnologyLahorePakistan
  4. 4.Physics and Astronomy Department, College of ScienceKing Saud UniversityRiyadhSaudi Arabia

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