zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2024-90-9-39-47zldm-2288Research ArticleИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. ФИЗИЧЕСКИЕ МЕТОДЫ ИССЛЕДОВАНИЯ И КОНТРОЛЯTESTING OF STRUCTURE AND PARAMETERS. PHYSICAL METHODS OF TESTING AND QUALITY CONTROLИсследование магнитных и структурных свойств ферритов BaFe12 – xCuxO19, полученных методом гидротермального синтезаStudy of the magnetic and structural properties of BaFe12 – xCuxO19 ferrites obtained by hydrothermal synthesisМироновичА. Ю.MironovichA. Yu.

Андрей Юрьевич Миронович

117409, Москва, Ленинский просп., д. 4

Andrey Yu. Mironovich

4, Leninsky prosp., Moscow, 117409

mironovich.ai@misis.ruКостишинВ. Г.KostishinV. G.

Владимир Григорьевич Костишин

117409, Москва, Ленинский просп., д. 4

Vladimir G. Kostishin

4, Leninsky prosp., Moscow, 117409

Аль-ХафаджиХ. И.Al-KhafajiH. I.

Хусам Имад Аль-Хафаджи

117409, Москва, Ленинский просп., д. 4

Husam I. Al-Khafaji

4, Leninsky prosp., Moscow, 117409

СавченкоЕ. С.SavchenkoE. S.

Елена Сергеевна Савченко

117409, Москва, Ленинский просп., д. 4

Elena S. Savchenko

4, Leninsky prosp., Moscow, 117409

АстаховВ. А.AstakhovV. A.

Василий Андреевич Астахов

117409, Москва, Ленинский просп., д. 4

Vasiliy A. Astakhov

4, Leninsky prosp., Moscow, 117409

РильА. И.RilA. I.

Алексей Игоревич Риль

119991, Москва, Ленинский просп., д. 31

Alexey I. Ril

RAS, 31, Leninsky prosp., Moscow, 119991

НИТУ «МИСиС»РоссияNUST «MISIS»Russian FederationИнститут общей и неорганической химии имени Н. С. Курнакова РАНРоссияKurnakov Institute of General and Inorganic ChemistryRussian Federation2024230920249093947Copyright © Миронович А.Ю., Костишин В.Г., Аль-Хафаджи Х.I., Савченко Е.С., Астахов В.А., Риль А.И., 20242024Миронович А.Ю., Костишин В.Г., Аль-Хафаджи Х., Савченко Е.С., Астахов В.А., Риль А.И.Mironovich A.Y., Kostishin V.G., Al-Khafaji H.I., Savchenko E.S., Astakhov V.A., Ril A.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.zldm.ru/jour/article/view/2288

Гексагональные ферриты М-типа (в частности, BaFe12O19) — магнитные материалы, на функциональные характеристики которых влияют как химический состав, так и технология изготовления. В работе представлены результаты исследования магнитных и структурных свойств гексаферритов BaFe12 – xCuxO19 (x = 0, 0,1, 0,2, 0,3, 0,4), полученных методом гидротермального синтеза, при частичном замещении железа медью. Состав синтезированных образцов анализировали с помощью рентгенофазового анализа, магнитные характеристики измеряли с помощью вибрационного магнитометра. Установлено, что коэрцитивная сила исследуемых порошков зависит от концентрации меди немонотонно и принимает максимальное (5629 Э) и минимальное (4698 Э) значения при x = 0 и x = 0,2. То есть присутствие меди принципиально снижает коэрцитивную силу, но при этом ее значения остаются довольно высокими относительно результатов аналогичных исследований. С ростом x намагниченность насыщения полученных ферритов постепенно снижается (с 65,88 до 60,75 А · м2/кг при x = 0 и x = 0,4 соответственно). Распределение Cu по подрешеткам феррита исследовали с использованием мессбауэровской спектроскопии. Показано, что в структуре гексаферрита ионы меди предпочтительно занимают позиции 12k и 4f1. Из этого следует, что снижение намагниченности насыщения с ростом х скорее всего обусловлено наличием побочных немагнитных фаз, наблюдаемых на рентгеновских дифрактограммах. Выявлено также, что в процессе синтеза медь участвует в образовании на поверхности зерен гексаферрита легкоплавких фаз, способствующих агломерации частиц. Это значит, что полученные порошки потенциально можно спекать при пониженных температурах и, следовательно, без существенного увеличения размеров кристаллитов. Коэрцитивная сила при этом сохраняет исходные высокие значения. Полученные результаты могут быть использованы при создании ферритовых постоянных магнитов с улучшенными характеристиками.

Hexagonal ferrites of M-type (in particular, BaFe12O19) are magnetic materials with functional characteristics affected both by chemical composition and technology of their synthesis. We present the results of studying the magnetic and structural properties of BaFe12 – xCuxO19 hexaferrites (x = 0, 0.1, 0.2, 0.3, 0.4) obtained by hydrothermal synthesis with partial substitution of copper for iron. The composition of the synthesized samples was analyzed using X-ray diffraction, and the magnetic characteristics were measured using a vibration magnetometer. It has been revealed that the coercivity of the ferrite powders depends non-monotonically on the copper concentration and reaches the maximum (5629 Oe) and minimum (4698 Oe) values at x = 0 and x = 0.2. The presence of copper reduces the coercive force, but at the same time the values remain rather high compared to the results of similar studies. The saturation magnetization of the obtained ferrites gradually decreases (from 65.88 to 60.75 A · m2/kg at x = 0 and x = 0.4, respectively) with increasing. The distribution of Cu over ferrite sublattices was studied using Mössbauer spectroscopy. It is shown that in the hexaferrite structure, copper ions preferentially occupy 12k and 4f1 sites. Hence, a decrease in the saturation magnetization with increasing x is most likely attributed to the presence of side non-magnetic phases observed on X-ray diffraction patterns. It is also revealed that during synthesis, copper participates in the formation of low-melting phases on the surface of hexaferrite grains which promotes agglomeration of the particles. Thus, the resulting powders can potentially be sintered at lower temperatures and, therefore, without a significant increase in the size of crystallites. Herewith, the coercivity retains its original high values. The results obtained can be used in developing ferrite permanent magnets with improved characteristics.

гексаферрит бариягидротермальный синтезмессбауэровская спектроскопиямагнитные измерениярентгенофазовый анализbarium hexaferritehydrothermal synthesisMössbauer spectroscopymagnetic measurementsX-ray diffractionReferencesTownes W. D., Fang J. H., Perrotta A. J. The crystal structure and refinement of ferrimagnetic barium ferrite, BaFe12O19 / Z. Kristallogr. Krist. 1967. Vol. 125. N 1 – 6. P. 437 – 449. DOI: 10.1524/zkri.1967.125.16.437Townes W. D., Fang J. H., Perrotta A. J. The crystal structure and refinement of ferrimagnetic barium ferrite, BaFe12O19 / Z. Kristallogr. Krist. 1967. Vol. 125. N 1 – 6. P. 437 – 449. DOI: 10.1524/zkri.1967.125.16.437Chao L., Fu E., Koomson V., Afsar M. Millimeter wave complementary metal-oxide-semiconductor on-chip hexagonal ferrite circulator / J. Appl. Phys. 2014. Vol. 115. N 17. P. 17E511. DOI: 10.1063/1.4864136Chao L., Fu E., Koomson V., Afsar M. Millimeter wave complementary metal-oxide-semiconductor on-chip hexagonal ferrite circulator / J. Appl. Phys. 2014. Vol. 115. N 17. P. 17E511. DOI: 10.1063/1.4864136Akkapanthula S., Kagita S., Voma U. Microstrip-line-based K-band isolator and Ku-band phase shifter with barium hexa ferrite disc / Microw. Opt. Technol. Lett. 2024. Vol. 66. N 1. P. e33974. DOI: 10.1002/mop.33974Akkapanthula S., Kagita S., Voma U. Microstrip-line-based K-band isolator and Ku-band phase shifter with barium hexa ferrite disc / Microw. Opt. Technol. Lett. 2024. Vol. 66. N 1. P. e33974. DOI: 10.1002/mop.33974Tahanian H., Aliahmadi M., Faiz J. Ferrite permanent magnets in electrical machines: Opportunities and challenges of a non-rare-earth alternative / IEEE Trans. Magn. 2020. Vol. 56. N 3. P. 1 – 20. DOI: 10.1109/TMAG.2019.2957468Tahanian H., Aliahmadi M., Faiz J. Ferrite permanent magnets in electrical machines: Opportunities and challenges of a non-rare-earth alternative / IEEE Trans. Magn. 2020. Vol. 56. N 3. P. 1 – 20. DOI: 10.1109/TMAG.2019.2957468Pullar R. C. Hexagonal ferrites: a review of the synthesis, properties and applications of hexaferrite ceramics / Prog. Mater. Sci. 2012. Vol. 57. N 7. P. 1191 – 1334. DOI: 10.1016/j.pmatsci.2012.04.001Pullar R. C. Hexagonal ferrites: a review of the synthesis, properties and applications of hexaferrite ceramics / Prog. Mater. Sci. 2012. Vol. 57. N 7. P. 1191 – 1334. DOI: 10.1016/j.pmatsci.2012.04.001Wang Z., Song Y., Sun Y., et al. Millimeter wave phase shifter based on ferromagnetic resonance in a hexagonal barium ferrite thin film / Appl. Phys. Lett. 2010. Vol. 97. N 7. P. 072509. DOI: 10.1063/1.3481086Wang Z., Song Y., Sun Y., et al. Millimeter wave phase shifter based on ferromagnetic resonance in a hexagonal barium ferrite thin film / Appl. Phys. Lett. 2010. Vol. 97. N 7. P. 072509. DOI: 10.1063/1.3481086Muratov D. G., Kozhitov L. V., Popkova A. V., et al. Study of the radar absorption of metal-carbon nanocomposites (review) / Industr. Lab. Mater. Diagn. 2023. Vol. 89. N 1. P. 35 – 45 [in Russian]. DOI: 10.26896/1028-6861-2023-89-1-35-45Muratov D. G., Kozhitov L. V., Popkova A. V., et al. Study of the radar absorption of metal-carbon nanocomposites (review) / Industr. Lab. Mater. Diagn. 2023. Vol. 89. N 1. P. 35 – 45 [in Russian]. DOI: 10.26896/1028-6861-2023-89-1-35-45Yakovleva N. M., Kokatev A. N., Oskin K. I., et al. Study of black protective-decorative nanocomposite anodic coatings on the surface of AMg5 aluminum alloy / Industr. Lab. Mater. Diagn. 2023. V. 89. N 7. P. 34 – 44 [in Russian]. DOI: 10.26896/1028-6861-2023-89-7-34-44Yakovleva N. M., Kokatev A. N., Oskin K. I., et al. Study of black protective-decorative nanocomposite anodic coatings on the surface of AMg5 aluminum alloy / Industr. Lab. Mater. Diagn. 2023. V. 89. N 7. P. 34 – 44 [in Russian]. DOI: 10.26896/1028-6861-2023-89-7-34-44Zahn D., Diegel M., Valitova A., et al. Magnetic Barium Hexaferrite Nanoparticles with Tunable Coercivity as Potential Magnetic Heating Agents / Nanomaterials. 2024. Vol. 14. N 12. P. 992 – 1011. DOI: 10.3390/nano14120992Zahn D., Diegel M., Valitova A., et al. Magnetic Barium Hexaferrite Nanoparticles with Tunable Coercivity as Potential Magnetic Heating Agents / Nanomaterials. 2024. Vol. 14. N 12. P. 992 – 1011. DOI: 10.3390/nano14120992Kostishin V. G., Korovushkin V. V., Pokholok K. V., et al. Cation Distribution and Magnetic Properties of Polycrystalline Hexagonal BaFe12 – xSnxO19 Ferrites / Phys. Solid State. 2021. Vol. 63. N 11. P. 1680 – 1689. DOI: 10.1134/S1063783421100176Kostishin V. G., Korovushkin V. V., Pokholok K. V., et al. Cation Distribution and Magnetic Properties of Polycrystalline Hexagonal BaFe12 – xSnxO19 Ferrites / Phys. Solid State. 2021. Vol. 63. N 11. P. 1680 – 1689. DOI: 10.1134/S1063783421100176Sharma M., Kashyap S. Improvement in magnetic parameters of polycrystalline barium hexaferrite by nonmagnetic cation substitution and microwave processing / Ceram. Int. 2019. Vol. 45. N 9. P. 11226 – 11232. DOI: 10.1016/j.ceramint.2019.02.136Sharma M., Kashyap S. Improvement in magnetic parameters of polycrystalline barium hexaferrite by nonmagnetic cation substitution and microwave processing / Ceram. Int. 2019. Vol. 45. N 9. P. 11226 – 11232. DOI: 10.1016/j.ceramint.2019.02.136Jasrotia R., Prakash J., Verma R., et al. Synthesis, characterization, and applications of doped barium hexaferrites: a review / Phys. B: Condens. 2023. Vol. 667. 415202. DOI: 10.1016/j.physb.2023.415202Jasrotia R., Prakash J., Verma R., et al. Synthesis, characterization, and applications of doped barium hexaferrites: a review / Phys. B: Condens. 2023. Vol. 667. 415202. DOI: 10.1016/j.physb.2023.415202Satyapal H. K., Singh R. K., Kumar S. S., Das S. B. Tuning the structural, magnetic and multiferroic properties of Sm3+ substituted barium hexaferrites BaFe12 – xSmxO19 nanoceramics / Mater. Today: Proc. 2021. Vol. 44. P. 1833 – 1840. DOI: 10.1016/j.matpr.2020.12.011Satyapal H. K., Singh R. K., Kumar S. S., Das S. B. Tuning the structural, magnetic and multiferroic properties of Sm3+ substituted barium hexaferrites BaFe12 – xSmxO19 nanoceramics / Mater. Today: Proc. 2021. Vol. 44. P. 1833 – 1840. DOI: 10.1016/j.matpr.2020.12.011Sözeri H., Deligöz H., Kavas H., Baykal A. Magnetic, dielectric and microwave properties of M-Ti substituted barium hexaferrites (M = Mn2+, Co2+, Cu2+, Ni2+, Zn2+) / Ceram. Int. 2014. Vol. 40. N 6. P. 8645 – 8657. DOI: 10.1016/j.ceramint.2014.01.082Sözeri H., Deligöz H., Kavas H., Baykal A. Magnetic, dielectric and microwave properties of M-Ti substituted barium hexaferrites (M = Mn2+, Co2+, Cu2+, Ni2+, Zn2+) / Ceram. Int. 2014. Vol. 40. N 6. P. 8645 – 8657. DOI: 10.1016/j.ceramint.2014.01.082Vakhitov M. G., Klygach D. S., Vinnik D. A., et al. Microwave properties of aluminum-substituted barium hexaferrite BaFe12 – xAlxO19 ceramics in the frequency range of 32 – 50 GHz / J. Alloys Compd. 2020. Vol. 816. P. 152682. DOI: 10.1016/j.jallcom.2019.152682Vakhitov M. G., Klygach D. S., Vinnik D. A., et al. Microwave properties of aluminum-substituted barium hexaferrite BaFe12 – xAlxO19 ceramics in the frequency range of 32 – 50 GHz / J. Alloys Compd. 2020. Vol. 816. P. 152682. DOI: 10.1016/j.jallcom.2019.152682Vinnik D. A., Starikov A. Y., Zhivulin V. E., et al. Structure and magnetodielectric properties of titanium substituted barium hexaferrites / Ceram. Int. 2021. Vol. 47. N 12. P. 17293 – 17306. DOI: 10.1016/j.ceramint.2021.03.041Vinnik D. A., Starikov A. Y., Zhivulin V. E., et al. Structure and magnetodielectric properties of titanium substituted barium hexaferrites / Ceram. Int. 2021. Vol. 47. N 12. P. 17293 – 17306. DOI: 10.1016/j.ceramint.2021.03.041Lu S., Liu Y., Yin Q., et al. Effects of Ce-Zn co-substitution on the structural and magnetic properties of M-type barium hexaferrites / J. Magn. Magn. Mater. 2022. Vol. 564. P. 170068. DOI: 10.1016/j.jmmm.2022.170068Lu S., Liu Y., Yin Q., et al. Effects of Ce-Zn co-substitution on the structural and magnetic properties of M-type barium hexaferrites / J. Magn. Magn. Mater. 2022. Vol. 564. P. 170068. DOI: 10.1016/j.jmmm.2022.170068Kostishin V. G., Korovushkin V. V., Isaev I. M., et al. Features of the Cation Distribution and Magnetic Properties of BaFe12 – xYxO19 Hexaferrites / Phys. Solid State. 2021. Vol. 63. P. 253 – 260. DOI: 10.1134/S106378342102013XKostishin V. G., Korovushkin V. V., Isaev I. M., et al. Features of the Cation Distribution and Magnetic Properties of BaFe12 – xYxO19 Hexaferrites / Phys. Solid State. 2021. Vol. 63. P. 253 – 260. DOI: 10.1134/S106378342102013XMahadevan S., Sankar A., Singh S., Sharma P. Enhanced X-band absorption and shielding performance of Gd-substituted barium hexaferrite / J. Alloys Compd. 2023. Vol. 959. P. 170456. DOI: 10.1016/j.jallcom.2023.170456Mahadevan S., Sankar A., Singh S., Sharma P. Enhanced X-band absorption and shielding performance of Gd-substituted barium hexaferrite / J. Alloys Compd. 2023. Vol. 959. P. 170456. DOI: 10.1016/j.jallcom.2023.170456Fasate S. K., Salunke P. S., Rode S. A., et al. Electrical, dielectric and magnetic properties of Mn2+ substitution in barium hexaferrites nanoparticles / Mater. Today: Proc. 2023. Vol. 92. P. 980 – 985. DOI: 10.1016/j.matpr.2023.04.590Fasate S. K., Salunke P. S., Rode S. A., et al. Electrical, dielectric and magnetic properties of Mn2+ substitution in barium hexaferrites nanoparticles / Mater. Today: Proc. 2023. Vol. 92. P. 980 – 985. DOI: 10.1016/j.matpr.2023.04.590Dhage V. N., Mane M. L., Rathod S. B., et al. Electric, dielectric and AC electrical conductivity study of Al3+ substituted barium hexaferrite nanoparticles synthesized by Sol-gel auto-combustion technique / Mater. Today: Proc. 2021. Vol. 47. P. 1982 – 1987. DOI: 10.1016/j.matpr.2021.04.119Dhage V. N., Mane M. L., Rathod S. B., et al. Electric, dielectric and AC electrical conductivity study of Al3+ substituted barium hexaferrite nanoparticles synthesized by Sol-gel auto-combustion technique / Mater. Today: Proc. 2021. Vol. 47. P. 1982 – 1987. DOI: 10.1016/j.matpr.2021.04.119Chokprasombat K., Lohmaah A., Pinitsoontorn S., Sirisathitkul C. Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites / J. King Saud Univ. Sci. 2022. Vol. 34. N 1. P. 101682. DOI: 10.1016/j.jksus.2021.101682Chokprasombat K., Lohmaah A., Pinitsoontorn S., Sirisathitkul C. Effects of bismuth and bismuth-copper substitutions on structure, morphology, and magnetic properties of sol-gel derived barium hexaferrites / J. King Saud Univ. Sci. 2022. Vol. 34. N 1. P. 101682. DOI: 10.1016/j.jksus.2021.101682Sharma S., Satyapal H., Kumar S., et al. Effect of Gd3+ substitution on the structural and magnetic properties of barium hexaferrite nanomaterials / Mater. Today: Proc. 2021. Vol. 44. P. 2587 – 2592. DOI: 10.1016/j.matpr.2020.12.650Sharma S., Satyapal H., Kumar S., et al. Effect of Gd3+ substitution on the structural and magnetic properties of barium hexaferrite nanomaterials / Mater. Today: Proc. 2021. Vol. 44. P. 2587 – 2592. DOI: 10.1016/j.matpr.2020.12.650Godara S., Kaur V., Malhi P., et al. Sol-gel auto-combustion synthesis of double metal-doped barium hexaferrite nanoparticles for permanent magnet applications / J. Solid State Chem. 2022. Vol. 312. P. 123215. DOI: 10.1016/j.jssc.2022.123215Godara S., Kaur V., Malhi P., et al. Sol-gel auto-combustion synthesis of double metal-doped barium hexaferrite nanoparticles for permanent magnet applications / J. Solid State Chem. 2022. Vol. 312. P. 123215. DOI: 10.1016/j.jssc.2022.123215Korovushkin V. V., Trukhanov A. V., Kostishin V. G., et al. Correlation between the Chemical Composition, Crystal Structure, and Magnetic Properties of Hexagonal Barium Ferrite with Zn2+ Heterovalent Substitution / Inorg. Mater. 2020. Vol. 56. P. 707 – 715. DOI: 10.1134/S0020168520070080Korovushkin V. V., Trukhanov A. V., Kostishin V. G., et al. Correlation between the Chemical Composition, Crystal Structure, and Magnetic Properties of Hexagonal Barium Ferrite with Zn2+ Heterovalent Substitution / Inorg. Mater. 2020. Vol. 56. P. 707 – 715. DOI: 10.1134/S0020168520070080Rana K., Thakur P., Tomar M., et al. Investigation of cobalt substituted M-type barium ferrite synthesized via co-precipitation method for radar absorbing material in Ku-band (12 – 18 GHz) / Ceram. Int. 2018. Vol. 44. N 6. P. 6370 – 6375. DOI: 10.1016/j.ceramint.2018.01.028Rana K., Thakur P., Tomar M., et al. Investigation of cobalt substituted M-type barium ferrite synthesized via co-precipitation method for radar absorbing material in Ku-band (12 – 18 GHz) / Ceram. Int. 2018. Vol. 44. N 6. P. 6370 – 6375. DOI: 10.1016/j.ceramint.2018.01.028Khaliq N., Bibi I., Majid F., et al. Zn and Mn doped Ba1 – xZnxFe12 – yMnyO19 as highly photoactive under visible light with enhanced electrochemical and dielectric properties / Mater. Sci. Semicond. Process. 2022. Vol. 139. P. 106324. DOI: 10.1016/j.mssp.2021.106324Khaliq N., Bibi I., Majid F., et al. Zn and Mn doped Ba1 – xZnxFe12 – yMnyO19 as highly photoactive under visible light with enhanced electrochemical and dielectric properties / Mater. Sci. Semicond. Process. 2022. Vol. 139. P. 106324. DOI: 10.1016/j.mssp.2021.106324Muhiuddin G., Bibi I., Nazeer Z., et al. Synthesis of Ni doped barium hexaferrite by microemulsion route to enhance the visible light-driven photocatalytic degradation of crystal violet dye / Ceram. Int. 2023. Vol. 49. N 3. P. 4342 – 4355. DOI: 10.1016/j.ceramint.2022.09.319Muhiuddin G., Bibi I., Nazeer Z., et al. Synthesis of Ni doped barium hexaferrite by microemulsion route to enhance the visible light-driven photocatalytic degradation of crystal violet dye / Ceram. Int. 2023. Vol. 49. N 3. P. 4342 – 4355. DOI: 10.1016/j.ceramint.2022.09.319Wang M., Xu Q., Wang S., et al. Formation of BaFe12 – xNixO19 ceramics with considerably high dielectric and magnetic property coexistence / J. Alloys Compd. 2018. Vol. 765. P. 951 – 960. DOI: 10.1016/j.jallcom.2018.06.221Wang M., Xu Q., Wang S., et al. Formation of BaFe12 – xNixO19 ceramics with considerably high dielectric and magnetic property coexistence / J. Alloys Compd. 2018. Vol. 765. P. 951 – 960. DOI: 10.1016/j.jallcom.2018.06.221Waqar M., Rafiq M., Mirza T., et al. Synthesis and properties of nickel-doped nanocrystalline barium hexaferrite ceramic materials / Appl. Phys. A. 2018. Vol. 124. P. 1 – 7. DOI: 10.1007/s00339-018-1717-zWaqar M., Rafiq M., Mirza T., et al. Synthesis and properties of nickel-doped nanocrystalline barium hexaferrite ceramic materials / Appl. Phys. A. 2018. Vol. 124. P. 1 – 7. DOI: 10.1007/s00339-018-1717-zMironovich A. Y., Kostishin V. G., Al-Khafaji H. I., et al. Study of structure, cation distribution and magnetic properties of Ni substituted M-type barium hexaferrite / Materialia. 2023. Vol. 32. P. 101898. DOI: 10.1016/j.mtla.2023.101898Mironovich A. Y., Kostishin V. G., Al-Khafaji H. I., et al. Study of structure, cation distribution and magnetic properties of Ni substituted M-type barium hexaferrite / Materialia. 2023. Vol. 32. P. 101898. DOI: 10.1016/j.mtla.2023.101898Döbelin N., Kleeberg R. Profex: a graphical user interface for the Rietveld refinement program BGMN / J. Appl. Crystallogr. 2015. Vol. 48. P. 1573 – 1580. DOI: 10.1107/S1600576715014685Döbelin N., Kleeberg R. Profex: a graphical user interface for the Rietveld refinement program BGMN / J. Appl. Crystallogr. 2015. Vol. 48. P. 1573 – 1580. DOI: 10.1107/S1600576715014685Makovec D., Belec B., Goršak T., et al. Discrete evolution of the crystal structure during the growth of Ba-hexaferrite nanoplatelets / Nanoscale. 2018. Vol. 10. N 30. P. 14480 – 14491. DOI: 10.1039/C8NR03815EMakovec D., Belec B., Goršak T., et al. Discrete evolution of the crystal structure during the growth of Ba-hexaferrite nanoplatelets / Nanoscale. 2018. Vol. 10. N 30. P. 14480 – 14491. DOI: 10.1039/C8NR03815ELiu X., Wang J., Gan L., Ng S. Improving the magnetic properties of hydrothermally synthesized barium ferrite / J. Magn. Magn. Mater. 1999. Vol. 195. N 2. P. 452 – 459. DOI: 10.1016/S0304-8853(99)00123-7Liu X., Wang J., Gan L., Ng S. Improving the magnetic properties of hydrothermally synthesized barium ferrite / J. Magn. Magn. Mater. 1999. Vol. 195. N 2. P. 452 – 459. DOI: 10.1016/S0304-8853(99)00123-7Mironovich A. Y., Kostishin V. G., Shakirzyanov R. I., et al. Effect of the Fe/Ba and Fe/Sr ratios on the phase composition, dielectric properties and magnetic characteristics of M-type hexaferrites prepared by the hydrothermal method / J. Solid State Chem. 2022. Vol. 316. P. 123625. DOI: 10.1016/j.jssc.2022.123625Mironovich A. Y., Kostishin V. G., Shakirzyanov R. I., et al. Effect of the Fe/Ba and Fe/Sr ratios on the phase composition, dielectric properties and magnetic characteristics of M-type hexaferrites prepared by the hydrothermal method / J. Solid State Chem. 2022. Vol. 316. P. 123625. DOI: 10.1016/j.jssc.2022.123625Mironovich A. Y., Kostishin V. G., Al-Khafaji H. I., et al. Magnetic and structural properties of Co-substituted barium hexaferrite synthesized by hydrothermal method / J. Magn. Magn. Mater. 2023. Vol. 588. P. 171469. DOI: 10.1016/j.jmmm.2023.171469Mironovich A. Y., Kostishin V. G., Al-Khafaji H. I., et al. Magnetic and structural properties of Co-substituted barium hexaferrite synthesized by hydrothermal method / J. Magn. Magn. Mater. 2023. Vol. 588. P. 171469. DOI: 10.1016/j.jmmm.2023.171469Lisjak D. The low-temperature sintering of M-type hexaferrites / J. Eur. Ceram. Soc. 2012. Vol. 32. N 12. P. 3351 – 3360. DOI: 10.1016/j.jeurceramsoc.2012.04.003Lisjak D. The low-temperature sintering of M-type hexaferrites / J. Eur. Ceram. Soc. 2012. Vol. 32. N 12. P. 3351 – 3360. DOI: 10.1016/j.jeurceramsoc.2012.04.003Vu H., Nguyen D., Fisher J., et al. CuO-based sintering aids for low temperature sintering of BaFe12O19 ceramics / J. Asian Ceram. Soc. 2013. Vol. 1. N 2. P. 170 – 177. DOI: 10.1016/j.jascer.2013.05.002Vu H., Nguyen D., Fisher J., et al. CuO-based sintering aids for low temperature sintering of BaFe12O19 ceramics / J. Asian Ceram. Soc. 2013. Vol. 1. N 2. P. 170 – 177. DOI: 10.1016/j.jascer.2013.05.002Wu C., Wang W., Li Q., et al. Barium hexaferrites with narrow ferrimagnetic resonance linewidth tailored by site-controlled Cu doping / J. Am. Ceram. Soc. 2022. Vol. 105. N 12. P. 7492 – 7501. DOI: 10.1111/jace.18702Wu C., Wang W., Li Q., et al. Barium hexaferrites with narrow ferrimagnetic resonance linewidth tailored by site-controlled Cu doping / J. Am. Ceram. Soc. 2022. Vol. 105. N 12. P. 7492 – 7501. DOI: 10.1111/jace.18702Shannon R. T., Prewitt C. T. Effective ionic radii in oxides and fluorides / Acta Crystallogr. B. 1969. Vol. 25. N 5. P. 925 – 946. DOI: 10.1107/S0567740869003220Shannon R. T., Prewitt C. T. Effective ionic radii in oxides and fluorides / Acta Crystallogr. B. 1969. Vol. 25. N 5. P. 925 – 946. DOI: 10.1107/S0567740869003220Lohmaah A., Chokprasombat K., Pinitsoontorn S., Sirisathitkul C. Magnetic properties and morphology copper-substituted barium hexaferrites from sol-gel auto-combustion synthesis / Materials. 2021. N 14(19). P. 5873. DOI: 10.3390/ma14195873Lohmaah A., Chokprasombat K., Pinitsoontorn S., Sirisathitkul C. Magnetic properties and morphology copper-substituted barium hexaferrites from sol-gel auto-combustion synthesis / Materials. 2021. N 14(19). P. 5873. DOI: 10.3390/ma14195873Mahmoud M. H. Low temperature Mössbauer study of gallium substitution for iron in manganese — ferrite / Solid State Ion. 2005. Vol. 176. N 13 – 14. P. 1333 – 1336. DOI: 10.1016/j.ssi.2005.02.017Mahmoud M. H. Low temperature Mössbauer study of gallium substitution for iron in manganese — ferrite / Solid State Ion. 2005. Vol. 176. N 13 – 14. P. 1333 – 1336. DOI: 10.1016/j.ssi.2005.02.017Panda R., Balaji G., Gajbhiye N. Enhancement of Hyperfine Fields for Iron Atoms in γ’-Fe4 – xNixN (0.2 ≤ x ≤ 0.8) Compounds / Hyperfine interact. 2002. Vol. 141. P. 187 – 191. DOI: 10.1023/A:1021278709080Panda R., Balaji G., Gajbhiye N. Enhancement of Hyperfine Fields for Iron Atoms in γ’-Fe4 – xNixN (0.2 ≤ x ≤ 0.8) Compounds / Hyperfine interact. 2002. Vol. 141. P. 187 – 191. DOI: 10.1023/A:1021278709080Novák P., Idland K., Zalesskij A., et al. Magnons and sublattice magnetisations in hexagonal Ba ferrite / J. Phys. Condens. Matter. 1989. Vol. 1. N 43. P. 8171. DOI: 10.1088/0953-8984/1/43/017Novák P., Idland K., Zalesskij A., et al. Magnons and sublattice magnetisations in hexagonal Ba ferrite / J. Phys. Condens. Matter. 1989. Vol. 1. N 43. P. 8171. DOI: 10.1088/0953-8984/1/43/017Novák P., Rusz J. Exchange interactions in barium hexaferrite / Phys. Rev. B. 2005. Vol. 71. N. 18. P. 184433. DOI: 10.1103/PhysRevB.71.184433Novák P., Rusz J. Exchange interactions in barium hexaferrite / Phys. Rev. B. 2005. Vol. 71. N. 18. P. 184433. DOI: 10.1103/PhysRevB.71.184433

The authors declare that there are no conflicts of interest present.