chemicallytechFine Chemical TechnologiesТонкие химические технологии2410-65932686-7575MIREA – Russian Technological University (RTU MIREA).10.32362/2410-6593-2025-20-4-344-356PPMBCKchemicallytech-2277Research ArticleCHEMISTRY AND TECHNOLOGY OF INORGANIC MATERIALSХИМИЯ И ТЕХНОЛОГИЯ НЕОРГАНИЧЕСКИХ МАТЕРИАЛОВCr-substituted M-type hexaferrite solid solutions with high level of substitutionCr-substituted M-type hexaferrite solid solutions with high level of substitutionhttps://orcid.org/0000-0001-6333-5551ZykovaAlena R.ZykovaAlena R.

Зыкова Алена Романовна, к.х.н., научный сотрудник

Scopus Author ID 57203743055

Alena R. Zykova, Cand. Sci. (Chem.), Researcher, Crystal Growth Laboratory

76, Lenina pr., Chelyabinsk, 454080

Scopus Author ID 57203743055

zykovaar@susu.ruhttps://orcid.org/0009-0003-4773-1687KovalevAndrey I.KovalevAndrey I.

Ковалев Андрей Игоревич, аспирант

Scopus Author ID 59364557200

Andrey I. Kovalev, Postgraduate Student, Department of Materials Science, Physical and Chemical Properties of Materials

76, Lenina pr., Chelyabinsk, 454080

Scopus Author ID 59364557200

kovalev-andrey-i@mail.ruhttps://orcid.org/0000-0002-8461-9761SherstyukDarya P.SherstyukDarya P.

Шерстюк Дарья Петровна, аспирант

Scopus Author ID 57208630693

Darya P. Sherstyuk, Postgraduate Student, Department of Materials Science, Physical and Chemical Properties of Materials

76, Lenina pr., Chelyabinsk, 454080

Scopus Author ID 57208630693

sherstiukd@susu.ruhttps://orcid.org/0000-0002-4389-8936ZhivulinVladimir E.ZhivulinVladimir E.

Живулин Владимир Евгеньевич, к.ф.-м.н., заведующий лабораторией роста кристаллов

Vladimir E. Zhivulin, Cand. Sci. (Phys.-Math.), Head of the Crystal Growth Laboratory

76, Lenina pr., Chelyabinsk, 454080

Scopus Author ID 57044766800

ResearсherID U-50003-2019

zhivulinve@mail.ruhttps://orcid.org/0000-0001-6352-2816TaskaevSergey V.TaskaevSergey V.

Таскаев Сергей Валерьевич, д.ф.-м.н., ректор

Sergey V. Taskaev, Dr. Sci. (Phys.-Math.), Rector

129, Brat’ev Kashirinykh ul., Chelyabinsk, 454001

Scopus Author ID 55886287900

ResearсherID AAU-9890-2021

tsv@csu.ruhttps://orcid.org/0000-0002-5190-9834VinnikDenis A.VinnikDenis A.

Винник Денис Александрович, д.х.н., профессор РАН, профессор кафедры «Материаловедение и физико-химия материалов» ФГАОУ ВО «Южно-Уральский государственный университет»;

ведущий научный сотрудник, заведующий лабораторией полупроводниковых оксидных материалов, Институт квантовых технологий, ФГАОУ ВО «Московский физико-технический университет (национальный исследовательский университет)»

профессор, Институт химии, ФГБОУ ВО «Санкт-Петербургский государственный университет»

Denis A. Vinnik, Dr. Sci. (Chem.), Professor, Department of Materials Science, Physical and Chemical Properties of Materials; Leading Researcher-Head ofthe Laboratory of Semiconductor Oxide Materials; Professor, Institute of Chemistry

76, Lenina pr., Chelyabinsk, 454080; 9, Institutskii per., Dolgoprudnyi, Moscow oblast, 141700; 7–9, Universitetskaya nab., St. Petersburg, 199034

Scopus Author ID 24451310100

ResearсherID K-1594-2013

vinnikda@susu.ruлаборатория роста кристаллов, ФГАОУ ВО «Южно-Уральский государственный университет (национальный исследовательский университет) (454080, Россия, Челябинск, пр-т Ленина, д. 76)РоссияSouth Ural State University National Research UniversityRussian Federationкафедра «Материаловедение и физико-химия материалов», ФГАОУ ВО «Южно-Уральский государственный университет (национальный исследовательский университет) (454080, Россия, Челябинск, пр-т Ленина, д. 76)РоссияSouth Ural State University National Research UniversityRussian FederationФГАОУ ВО «Южно-Уральский государственный университет (национальный исследовательский университет) (454080, Россия, Челябинск, пр-т Ленина, д. 76).РоссияSouth Ural State University National Research UniversityRussian FederationФГБОУ ВО «Челябинский государственный университет» (454001, Челябинск, ул. Братьев Кашириных, д. 129).РоссияChelyabinsk State UniversityRussian FederationФГАОУ ВО «Южно-Уральский государственный университет (национальный исследовательский университет) (454080, Россия, Челябинск, пр-т Ленина, д. 76; ФГАОУ ВО «Московский физико-технический университет (национальный исследовательский университет)» (141701, Россия, Московская обл., г. Долгопрудный, Институтский пер., д. 9); Институт химии, ФГБОУ ВО «Санкт-Петербургский государственный университет» (199034, Россия, Санкт-Петербург, Университетская наб., д. 7-9).РоссияSouth Ural State University National Research University; Moscow Institute of Physics and Technology (State University); St. Petersburg State UniversityRussian Federation202502092025204344356Copyright © Zykova A.R., Kovalev A.I., Sherstyuk D.P., Zhivulin V.E., Taskaev S.V., Vinnik D.A., 20252025Zykova A.R., Kovalev A.I., Sherstyuk D.P., Zhivulin V.E., Taskaev S.V., Vinnik D.A.Zykova A.R., Kovalev A.I., Sherstyuk D.P., Zhivulin V.E., Taskaev S.V., Vinnik D.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.finechem-mirea.ru/jour/article/view/2277Objectives

Objectives. This study aims to synthesize strontium hexaferrites having a high level of chromium substitution (SrFe12−x Crx O19, x = 0–6) and investigate their structural, morphological, and magnetic properties.

Methods

Methods. The synthesis was carried out using the solid-phase reaction method at a temperature of 1400°C. The impact of chromium substitution for iron on the phase, structure, morphology, and magnetic characteristics was studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, and vibrating-sample magnetometry.

Results

Results. XRD analysis confirmed the development of single-phase samples having a hexagonal space group P63/mmc. An increase in Cr concentration leads to a decrease in unit cell parameters, due to the smaller ionic radius of Cr3+. The surface morphology of the samples consists of bulk crystallites a few microns in length. Substitution with Cr results in decreased saturation and remanent magnetization.

Conclusions

Conclusions. Pure samples of Cr-substituted strontium hexaferrite were synthesized. The linear dependence of the investigated structural parameters on the Cr concentration confirms the Cr substitution into the hexaferrite solid solution by Vegard’s law. In addition to structural parameters, magnetic characteristics were obtained for hexaferrite solid solutions. Saturation and remanent magnetization dependencies were shown to significantly decrease with Cr concentration, while coercive force varies in a complex dependence on Cr concentration. The sample with x = 1 has the highest product of coercive force and saturation magnetization, indicating its suitability for permanent magnet application.

Objectives

Objectives. This study aims to synthesize strontium hexaferrites having a high level of chromium substitution (SrFe12−xCrxO19, x = 0–6) and investigate their structural, morphological, and magnetic properties.

Methods

Methods. The synthesis was carried out using the solid-phase reaction method at a temperature of 1400°C. The impact of chromium substitution for iron on the phase, structure, morphology, and magnetic characteristics was studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, and vibrating-sample magnetometry.

Results

Results. XRD analysis confirmed the development of single-phase samples having a hexagonal space group P63/mmc. An increase in Cr concentration leads to a decrease in unit cell parameters, due to the smaller ionic radius of Cr3+. The surface morphology of the samples consists of bulk crystallites a few microns in length. Substitution with Cr results in decreased saturation and remanent magnetization.

Conclusions

Conclusions. Pure samples of Cr-substituted strontium hexaferrite were synthesized. The linear dependence of the investigated structural parameters on the Cr concentration confirms the Cr substitution into the hexaferrite solid solution by Vegard’s law. In addition to structural parameters, magnetic characteristics were obtained for hexaferrite solid solutions. Saturation and remanent magnetization dependencies were shown to significantly decrease with Cr concentration, while coercive force varies in a complex dependence on Cr concentration. The sample with x = 1 has the highest product of coercive force and saturation magnetization, indicating its suitability for permanent magnet application.

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