Bulletin of Materials Science

, Volume 34, Issue 7, pp 1415–1419 | Cite as

Influence of temperature on structural and magnetic properties of Co0·5Mn0·5Fe2O4 ferrites

  • S. M. Ramay
  • Murtaza Saleem
  • S. Atiq
  • Saadat A. Siddiqi
  • S. Naseem
  • M. Sabieh Anwar
Article

Abstract

Co0·5Mn0·5Fe2O4 ferrites have been synthesized using a single-step sol-gel auto-combustion method in which the metal nitrate (MN)-to-citric acid (CA) ratio was adjusted to 0.5: 1 and pH to 7, respectively. The structural and magnetic properties of as-burnt and annealed samples were studied as a function of temperature. The inverse spinel structure was confirmed by X-ray diffraction (XRD) and crystallite size was estimated by the most intense peak (311) using Scherrer’s formula. Contrary to earlier studies reported in the literature, both as-burnt and annealed samples exhibit crystalline behaviour. Room temperature magnetic properties were studied using vibrating sample magnetometer (VSM) with field strengths up to ±10 kOe. Lattice constant and crystallite size increased as the annealing temperature was increased. However, the coercivity (Hc) initially increased and then decreased with the increase of crystallite size. The variation in coercivity is ascribed to the transition from a multi-domain to a single-domain configuration.

Keywords

Sol-gel preparation ferrites crystallite size coercivity 

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Copyright information

© Indian Academy of Sciences 2011

Authors and Affiliations

  • S. M. Ramay
    • 2
  • Murtaza Saleem
    • 1
  • S. Atiq
    • 1
  • Saadat A. Siddiqi
    • 3
  • S. Naseem
    • 1
  • M. Sabieh Anwar
    • 2
  1. 1.Centre of Excellence in Solid State PhysicsUniversity of the PunjabLahorePakistan
  2. 2.School of Science and EngineeringLahore University of Management Sciences (LUMS), Opposite Sector U, DHALahorePakistan
  3. 3.Interdisciplinary Research Centre in Biomedical MaterialsCOMSATS IITLahorePakistan

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