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Issue 28, 2017
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Investigation into the structural features and microwave absorption of doped barium hexaferrites

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Abstract

BaFe12−xGaxO19 (x ≤ 1.2) hexaferrites were synthesized via the usual ceramic technology. It has been established that with an increase in x, the unit cell and magnetic parameters monotonically decrease. The frequency of natural ferromagnetic resonance firstly decreases from 49.6 GHz down to 49.1 GHz when x = 0.6, and then it increases up to 50.5 GHz. The line width monotonically increases from 3.5 GHz up to 5 GHz. The peak amplitude of the resonant curve changes slightly with the exception of when x = 0.9, when it reaches −16 dB. The 1.3 GHz kOe−1 frequency shift in the bias field is more intensive for small values, when x = 0.3. The decreasing values of the magnetic parameters are a result of the dilution of Fe3+–O2−–Fe3+ superexchange interactions. The behavior of the amplitude-frequency characteristics is largely determined through the reduction of uniaxial exchange anisotropy. The prospects of Ga-substituted hexaferrites acting as a material that effectively absorbs the high-frequency electromagnetic radiation are shown.

Graphical abstract: Investigation into the structural features and microwave absorption of doped barium hexaferrites

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Publication details

The article was received on 10 May 2017, accepted on 03 Jun 2017 and first published on 27 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01708A
Citation: Dalton Trans., 2017,46, 9010-9021
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    Investigation into the structural features and microwave absorption of doped barium hexaferrites

    S. V. Trukhanov, A. V. Trukhanov, V. G. Kostishyn, L. V. Panina, An. V. Trukhanov, V. A. Turchenko, D. I. Tishkevich, E. L. Trukhanova, O. S. Yakovenko and L. Yu. Matzui, Dalton Trans., 2017, 46, 9010
    DOI: 10.1039/C7DT01708A

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