Effect of gallium doping on electromagnetic properties of barium hexaferrite. (December 2017)

• Record Type: Journal Article
• Authors: Trukhanov, S.V.; Trukhanov, A.V.; Kostishyn, V.G.; Panina, L.V.; Trukhanov, An.V.; Turchenko, V.A.; Tishkevich, D.I.; Trukhanova, E.L.; Yakovenko, O.S.; Matzui, L. Yu.; Vinnik, D.A.; Karpinsky, D.V.
• Is Part Of: Journal of physics and chemistry of solids. Volume 111(2017)
• Page Start: 142
• Page End: 152
• Publication Date: 2017-12
• Subjects: Solid state reactions -- Crystal structure -- Magnetic and absorption measurements -- Doped hexaferrites; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2017.07.014
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: The BaFe12-x Gax O19 (x ≤ 1.2) hexaferrites were synthesized by the usual ceramic technology. It was been established that with the x increase 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 resonant curve changes slightly with the exception for the x = 0.9 when it reaches −16 dB. The 1.3 GHz/kOe frequency shift in bias field is more intensive for small x = 0.3. The decreasing of the magnetic parameters is a result of the dilution of the Fe 3+ - O 2− - Fe 3+ superexchange interactions. The behavior of the amplitude-frequency characteristics is largely determined by the reduction of the uniaxial exchange anisotropy. The prospects of the Ga-substituted hexaferrites as a material effectively absorbing the high-frequency electromagnetic radiation are shown. Highlights: Ga doped barium hexaferrites were synthesized. Magnetic parameters were investigated. Amplitude-frequency characteristics were obtained. Reflection and transmission coefficients were found. Effect of bias field on ferromagnetic resonance was investigated.