Ca2+ and Mg2+ incorporated barium hexaferrites: structural and magnetic properties

M. A. Almessiere, Y. Slimani, H. S. El Sayed, A. Baykal

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


BaM hexaferrites substituted with both Ca2+ and Mg2+ ions, namely, Ba1-2×CaxMgxFe12O19 (0.0 ≤ x ≤ 0.1), synthesized during a sol–gel auto-combustion route. The hexaferrite phase and morphology of all samples were investigated using X-ray powder diffraction, a field emission scanning electron microscope, a high-resolution transmission microscope, and Fourier transform infrared spectroscopy. In addition, an M-type hexagonal structure was confirmed using XRD for all samples. FE-SEM and TEM revealed the shape of the hexagonal plate. Measurements of the magnetization versus the field M(H) of Ba1-2×CaxMgxFe12O19 (0.0 ≤ x ≤ 0.1) nanohexaferrites were conducted at 300 and 10 K. A hard-ferrimagnetic behavior at both 300 and 10 K was noted for the different products produced. The squareness ratio indicates the uniaxial anisotropy for various products. The deduced values of saturation magnetization (Ms) in all substituted samples are higher than in the pristine sample (x = 0). The Ba0.96Ca0.02Mg0.02Fe12O19 nanosized hexaferrite showed the highest values of Ms, remanence Mr, magneton number (nB), and magnetocrystalline anisotropy constant (Keff). In contrast, the values of the coercive field (Hc) and intrinsic coercivity (Hci) diminish with the increase in the amount of the substituted Ca and Mg elements.
Original languageEnglish (US)
Pages (from-to)628-638
Number of pages11
JournalJournal of Sol-Gel Science and Technology
Issue number3
StatePublished - Nov 5 2018
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-07
Acknowledgements: The authors would like to thank the Deanship of Scientific Research (DSR) and the Institute for Research & Medical Consultations (IRMC) of Imam Abdulrahman Bin Faisal University for providing financial assistance to this study (Application No, 2017-605-IRMC) and Core Labs of King Abdullah University of Science and Technology (KAUST) for the use of their resources.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Materials Chemistry
  • Biomaterials
  • Ceramics and Composites
  • General Chemistry
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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