Correlation of the chemical composition, phase content, structural characteristics and magnetic properties of the Bi-substituted M-type hexaferrites
Yao Y. Hrekau I.A. Tishkevich D.I. Zubar T.I. Turchenko V.A. Lu S. Silibin M.V. Migas D.B. Sayyed M.I. Trukhanov S.V. Trukhanov A.V.
15 November 2023Elsevier Ltd
Ceramics International
2023#49Issue 2237009 - 37016 pp.
Bi-substituted M-type hexaferrites, BaFe12-xBixO19 (0.1 ≤ x ≤ 1.2), or Bi-BaM, were produced by the solid-state reactions. The correlation between the phase content, chemical composition, crystal structure features, and peculiarities of the magnetic properties of Bi-BaM was established using XRD (X-ray diffraction), SEM (scanning electron microscopy), and VSM (vibrational sample magnetometry). XRD phase analysis made it possible to establish the limit of substitution of Fe3+ ions by Bi3+ ions. It was shown that at a low substitution level (x ≤ 0.3), no impurity phases were detected, and the samples are characterized by a single-phase state with the space group (SG) P63/mmc. As the degree of substitution (x ≥ 0.6) increases, the formation of impurity phases was observed, which can be explained by the difficulties of ion diffusion in the process of solid-phase synthesis as well as the formation of defects in the magnetoplumbite structure due to the large ionic radius of Bi3+. As impurity phases in the studied compositions (x ≥ 0.6) the following were noted: BiFeO3 (SG: Pnma); BiO2 (SG: Fm-3m); BaBi2O6 (SG: R-3); and Ba0.5Bi1.5O2.16 (SG: Im-3m). The content of the main phase (SG: P63/mmc) decreases from 95.11 to 88.27 vol% with an increase in x from 0.6 to 1.2, respectively. Analysis of SEM images showed the growth of particles up to 10 μm, depending on the concentration of bismuth oxide during hexaferrite synthase. The Bi-BaM magnetic characteristics were examined using VSM in the range of 3 T at 300 K. Due to the magnetic structures frustration, with increased x a decrease in saturation magnetization (Ms) was found. There were two concentration diapasons with different speeds of Ms decrease. In the first diapason, the main contribution belong to the magnetic structure frustration in the frame of the main phase (P63/mmc) due to the long-range Fe-O-Fe exchange interaction weakening (under Bi substitution). In the second diapason, the main contribution belong to the impurity phase formation and decrease of the main magnetic phase concentration in samples.
Bismuth ion , Chemical substitution , Hexaferrites , Magnetic properties
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MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
SSPA “Scientific and Practical Materials Research Centre of NAS of Belarus”, Minsk, 220072, Belarus
Belorussian State University Informatic and Radioelectronic, Minsk, 220013, Belarus
Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
I.M. Sechenov First Moscow State Medical University, Moscow, 119435, Russian Federation
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe shosse 31, Moscow, 115409, Russian Federation
Department of Physics, Faculty of Science, Isra University, Amman, 1162, Jordan
Department of Nuclear Medicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam, 31441, Saudi Arabia
Smart Sensor Laboratory, NUST MISiS, Moscow, 119049, Russian Federation
L.N. Gumilyov Eurasian National University, Astana, 010000, Kazakhstan
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
SSPA “Scientific and Practical Materials Research Centre of NAS of Belarus”
Belorussian State University Informatic and Radioelectronic
Joint Institute for Nuclear Research
I.M. Sechenov First Moscow State Medical University
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Department of Physics
Department of Nuclear Medicine Research
Smart Sensor Laboratory
L.N. Gumilyov Eurasian National University
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