Structural and Magnetic Behavior of BaAlxCryFe11O19 (x + y = 1) Hexagonal Ferrites

  • M. Alimoradi
  • M. YousefiEmail author
  • B. Sadeghi
  • M. M. Amini
  • A. Abbasi
Original Paper


The present study aims to analyze barium hexagonal ferrite and its derivation behavior using sol-gel auto-combustion co-doped with Al3+/Cr3+ions. Also, the effects of dopants on structural and magnetic properties of prepared samples were investigated. To this purpose, the finest powders were preheated at 500 °C for 1 h and calcinated at 900 °C about 2 h. Then, the magnetic powders were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and vibrating sample magnetometer (VSM). The XRD patterns show the magnetoplumbite phase. According to the Scherrer equation applied, inserting ions led to a decrease in lattice parameters (a and c) and crystallite size. The morphology of synthesized samples was observed by FESEM and proved the hexagonal shapes of the prepared samples. The nanoparticles sizes were recorded between 59 and 79 nm. Moreover, the magnetic properties of prepared samples were specified by VSM. The saturation magnetization (Ms) and remnant magnetization (Mr) of the synthesized magnetic powders were decreased by inserting Al3+/Cr3+ ions, while coercivity (Hc) increased from 5215 to 7178 Oe.

Graphical Abstract


Nanocomposites Magnetic properties Sol-gel processes Ferrites 



The authors would like to represent their acknowledgments to the Science and Research branch of Islamic Azad University.


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Copyright information

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

Authors and Affiliations

  • M. Alimoradi
    • 1
  • M. Yousefi
    • 2
    Email author
  • B. Sadeghi
    • 3
  • M. M. Amini
    • 4
  • A. Abbasi
    • 5
  1. 1.Department of Chemistry, Science and Research BranchIslamic Azad UniversityTehranIran
  2. 2.Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre Rey BranchIslamic Azad UniversityTehranIran
  3. 3.Department of Chemistry, Tonekabon BranchIslamic Azad UniversityTonekabonIran
  4. 4.Department of ChemistryShahid Beheshti UniversityTehranIran
  5. 5.School of ChemistryUniversity College of Science, University of TehranTehranIran

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