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; L Yu Matzui

doi:10.1039/c7dt01708a

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

Dalton Trans. 2017 Jul 18;46(28):9010-9021. doi: 10.1039/c7dt01708a.

Authors

Affiliations

¹ National University of Science and Technology "MISiS", Leninskii av., 4, Moscow, 119049 Russia. truhanov@ifttp.bas-net.by and Laboratory of single crystal growth, South Ural State University, Lenin av., 76, Chelyabinsk, 454080, Russia and Scientific Practical Materials Research Centre, National Academy of Sciences of Belarus, P. Brovki str., 19, Minsk, 220072 Belarus, Russia.
² National University of Science and Technology "MISiS", Leninskii av., 4, Moscow, 119049 Russia. truhanov@ifttp.bas-net.by.
³ National University of Science and Technology "MISiS", Leninskii av., 4, Moscow, 119049 Russia. truhanov@ifttp.bas-net.by and Scientific Practical Materials Research Centre, National Academy of Sciences of Belarus, P. Brovki str., 19, Minsk, 220072 Belarus, Russia.
⁴ Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980 Russia and Donetsk Institute for Physics and Engineering, National Academy of Sciences of Ukraine, R. Luxembourg str., 72, Donetsk, 83114 Ukraine and Donetsk Institute of Physics and Technology named after O.O. Galkin of the NAS of Ukraine, Prospect Nauky, 46, Kyiv, 03680, Ukraine.
⁵ Scientific Practical Materials Research Centre, National Academy of Sciences of Belarus, P. Brovki str., 19, Minsk, 220072 Belarus, Russia.
⁶ Kiev National University named after Taras Shevchenko, Vladimirskaya str., 64/13, Kiev, 01601 Ukraine.

PMID: 28654128
DOI: 10.1039/c7dt01708a

Abstract

BaFe_12-xGa_xO₁₉ (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⁺-O^2--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.