Study of structure, cation distribution and magnetic properties of Ni substituted M-type barium hexaferrite
Mironovich A.Y. Kostishin V.G. Al-Khafaji H.I. Timofeev A.V. Ril A.I. Shakirzyanov R.I.
December 2023Elsevier B.V.
Materialia
2023#32
In the present work, BaFe12-xNixO19 (x = 0, 0.1, 0.3, 0.5) powders were prepared by the hydrothermal method with post annealing. The obtained samples were analyzed by several methods, including XRD, Mossbauer spectroscopy, EDX, VSM, and AFM. Structural and elemental analyses confirm that Ni enters the hexaferrite lattice. Since Ni2+ replaces Fe3+, some charge compensation mechanism must be involved. According to the data obtained, the most probable mechanism is the formation of oxygen vacancies. Based on the results of Mossbauer spectroscopy and magnetic measurements, the cation distribution was established. The Ni2+ ions prefer to occupy the 12k site, which leads to a decrease in the saturation magnetization. All magnetic parameters (saturation magnetization, coercivity, and remanence) correlate negatively with the Ni concentration.
Barium hexaferrite , Hydrothermal synthesis , Magnetic measurements , Mossbauer spectroscopy , Substituted hexaferrite
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National University of Science and technology MISIS, Moscow, Leninsky Prospect, 4, 119049, Russian Federation
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences (IGIC RAS), Moscow, Leninsky Prospekt, 31, 119991, Russian Federation
Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana, 010008, Kazakhstan
National University of Science and technology MISIS
Kurnakov Institute of General and Inorganic Chemistry
Engineering Profile Laboratory
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