Study of the magnetic anisotropy of the multiphase samples of the ferrimagnets with hexagonal crystal structure by the method of ferromagnetic resonance

7th International Conference Radiation-thermal Effects and Processes in Inorganic Materials

材料科学;物理学

Zhuravlev, V.A.^1 ; Minin, R.M.^2 ; Itin, V.I.^2 ; Lopushnyak, Y.M.^1 ; Zhuravlev, A.V.^1 ; Lilenko, E.P.^1

National Research Tomsk State University, Lenina av. 36, Tomsk

634050, Russia^1

Tomsk Scientific Center SB RAS, pr. Academicheskii 10/4, Tomsk

634021, Russia^2

关键词: Effective field;    Hexagonal crystal structure;    Hexagonal crystals;    Machining conditions;    Magnetic parameters;    Mechanochemical reactions;    Multi-phase powders;    Planetary ball mill;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/168/1/012081/pdf
DOI  :  10.1088/1757-899X/168/1/012081

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The influence of machining conditions in a planetary ball mill on the phase composition, structural and magnetic parameters of hexaferrite powders composition BaFe12O19was investigated. The properties of powders vary greatly depending on the power density and the time of machining. Magnetocrystalline anisotropy of multiphase powders was studied by the method of ferromagnetic resonance. The effective field of magnetic anisotropy is reduced by more than two times, with decreasing particle size of ∼ 67 nm to ∼ 10 nm when the processing time equal to 10 minutes. The flow of mechanochemical reactions during grinding leads to the disintegration of the hexagonal crystal phase and the formation of the magnetite phase with a small value of the magnetocrystalline anisotropy field.