Radiation-Induced Changes in the Structure and Magnetic Properties of Barium Hexaferrite
Elizaveta D. ShipkovaMoscow State University of Environmental EngineeringN. S. PerovMoscow State University of Environmental EngineeringR. A. MakaryinMoscow State University of Environmental EngineeringA. Yu. PundaSouth Ural State University (National Research University), 454080, Chelyabinsk, RussiaВ.Е. ЖивулинSouth Ural State University (National Research University), 454080, Chelyabinsk, RussiaД.А. ВинникSt. Petersburg State University, 119034, St. Petersburg, RussiaМ. К. СалахитдиноваInstitute of Engineering Physics, Sharof Rashidov Samarkand State University, 140104, Samarkand, UzbekistanЭ. М. ИбрагимоваInstitute of Nuclear Physics, Academy of Sciences of the Republic of Uzbekistan, 100214, Tashkent, UzbekistanA. B. GranovskiySamarkand State Institute of Foreign Languages
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The effect of gamma irradiation and electron irradiation on the crystal structure and magnetic properties of barium hexaferrite BaFe12O19 (solid-phase synthesis) was studied. Irradiations caused changes in the ratio of crystalline phases and crystallite sizes, which resulted in changes in the main parameters of the hysteresis loop: coercive force, residual magnetization, saturation magnetization. These characteristics change nonmonotonically with varying dose, especially immediately after irradiation. In particular, the saturation magnetization measured at 300 K after γ-irradiation of the sample with a dose of 2.1 × 107 R decreased from the initial value of 52.5 to ∼40.2 emu/g.
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