Structural and microwave absorption properties of BaFe(122x) SnxZnxO19 (x=0.05–1.0) ceramic magnets

Yana Taryana, Yuyu Wahyu, Azwar Manaf, M. Manawan, Wisnu Ari Adi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A series of single-phase samples with BaFe(122x) SnxZnxO19 (x = 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.5, 0.7, and 1.0) compositions were successfully fabricated using a mechanical alloying technique. The ionic positions Zn2+ and Sn4+ occupy the same site as the Fe3+ions occupying tetrahedral and octahedral sites, respectively. Because the radius of Zn2+ and Sn4+ each is greater than that of Fe3+ the lattice parameters and the unit cell volume increased linearly with an increase of x. The co-substitution of Zn2+ and Sn4+ ions to Fe3+ in the main phase of BaFe12O19 changed the magnetic properties of the sample. Both Zn2+ and Sn4+ substituting ions reduced the magneto-crystalline anisotropy constant of the main phase from 2.3 × 106 erg/cc at x = 0.05 to 0.89 × 106 erg/cc at x = 1.0. This reduction, reduced coercivity from 16.34 kOe to 0.47 kOe. The saturation magnetization of the single-phase samples was not significantly decreased. All BaFe(12–2x) SnxZnxO19 samples were capable of absorbing the electromagnetic wave in the x-band frequency range with a single absorption peak. The best reflection loss (RL) of -28.1 dB with the largest bandwidth of 3.1 GHz was obtained in a single-phase sample with a composition of x = 0.35, having an impedance (Zin = 51.54-j3. 69 Ω) close to Zo (50 Ω).

Original languageEnglish
Article number101455
Publication statusPublished - Jun 2022


  • coercivity
  • Mechanical alloying
  • microwave absorption
  • reflection loss
  • saturation magnetization


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