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Article
Chemistry, Physical
Swati Verma et al.
Summary: Polycrystalline samples of M-type hexaferrite with varying chemical composition were successfully synthesized using solid state reaction technique. The structural, microstructural and magnetic properties of these samples were investigated. The results showed good phase purity, decreased crystallite size and increased cell volume with increasing dopant concentration. Furthermore, the hexaferrite samples exhibited excellent magnetic properties, making them suitable for various applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
Sana Ullah Asif et al.
Summary: This study investigates the structure and magnetic properties of Ba0.9Sm0.1Fe12-x Al x O19 (x = 0.0, 0.5, 1.0, 2.0, 3.0) M-type hexaferrites. The samples were prepared using the conventional ceramic route, and morphological analysis confirmed the absence of secondary phases and the formation of hexaferrites material. X-ray Diffraction analysis was conducted to determine the structural parameters, while magnetic properties were measured at room temperature. The synthesized material shows potential for magnetic applications such as transformer and inductor cores, microwave devices, recording heads, and magnetic shielding.
Article
Engineering, Multidisciplinary
Dmitry V. Wagner et al.
Summary: The manufacturing and researching of magnetic materials requires the development of new automated devices for measuring their magnetic properties. To obtain nanosized materials with a pure phase, it is necessary to modernize former methods and develop new methods for synthesizing materials. A pulse magnetometer was made to study magnetic hysteresis loops, which can conduct studies of the full cycle using pulsed magnetic fields. M-type BaFe12O19 hexagonal ferrites were synthesized and their structural, phase, and magnetic characteristics were studied. The methods for synthesizing BaFe12O19 hexagonal ferrites were estimated and compared, and their properties depend on the method of synthesis.
Article
Materials Science, Multidisciplinary
Qisong Sun et al.
Summary: This study presented a design of novel quasi-trivalent dual-main-phase (Nd, Ce)-Fe-B magnets, which achieved the highest energy product of 40.57 MGOe with 40% weight percentage of Ce. The superior magnetic properties were attributed to the quasi-trivalent valence of Ce and the isostructural heterogenous configuration that induced magnetic Ce3+ in the main phase. This research provided insights into controlling the Ce valence and designing high-performance Ce magnets using different main phases.
Article
Materials Science, Multidisciplinary
Anand Kumari et al.
Summary: Multiferroic composites with varying concentrations of (1 - x) BaTiO3-(x) BaFe12O19 (x = 0.50, 0.60, 0.70) were successfully synthesized using the solid-state reaction method. The composites showed the presence of BaTiO3 as the ferroelectric phase and BaFe12O19 as the ferromagnetic phase. XRD analysis confirmed the formation of crystal structure and phase purity without any chemical reaction. The dielectric, electric, and magnetic properties of the composites were analyzed, and an enhancement in the magnetic parameters was observed with an increase in the ferrite content.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Shagufta Gulbadan et al.
Summary: The sol-gel auto-combustion process was used to synthesize M-type hexagonal ferrite powder samples with the chemical formula Ba0.3Sr0.7-xCoxFe12-ySmyO19 (x = 0-0.5, y = 0-0.05). The samples were analyzed using X-ray diffraction technique (XRD), Raman, and photoluminescence spectroscopies. The results showed that the samples possessed a hexagonal structure and had the impurity phase alpha-Fe2O3. The samples demonstrated semiconductor properties with a bandgap energy of 1.875 eV and were found to be suitable for microwave and high-frequency applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Shagufta Gulbadan et al.
Summary: Ba0.6Sr0.4-xYbxFe12-yCoyO19 M-type hexaferrite was synthesized using the auto combustion sol-gel process and sintered in a muffle furnace. XRD, FTIR, Raman, and Photoluminescence spectroscopies were used to analyze the samples. The XRD patterns confirmed the single phase of the synthesized samples. Changes in Yb-Co concentration affected lattice parameters and unit cell volume. FTIR spectroscopy revealed the formation of multiple absorption bands. Raman spectra showed strain in the unit cell. PL spectra exhibited emissions in the range of 630 nm-700 nm. The substitution improved dielectric losses and AC conductivity. The findings suggest that samples with appropriate cationic substitution can be used for microwave and high-frequency applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Ishfaq Ahmad Parray et al.
Summary: This paper presents the synthesis and characterization of rare-earth doped magnesium ferrite for hydroelectric energy conversion. The synthesized material exhibited phase purity and single phase spinel cubic formation. The presence of defects and oxygen vacancies in the ferrite material led to water dissociation on its surface, enabling the generation of hydroelectricity. The synthesized samples demonstrated ferroelectric behavior and soft magnetic behavior.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Shifan Lu et al.
Summary: The effect of pre-sintering temperature on the structural and magnetic properties of oriented M-type hexagonal strontium ferrite Sr0.7Ce0.3Fe11.7Zn0.3O19 was investigated. The results show that Fe2O3 and CeO2 impurity phases exist in all samples. With increasing pre-sintering temperature, saturation magnetization (Ms) and remanence ratio (Mr/Ms) initially increased and then decreased. Conversely, coercivity (Hc) and magnetocrystalline anisotropy field (Ha) first decreased and then increased. The average grain size (D) increased monotonously with pre-sintering temperature. At a pre-sintering temperature of 1200 degrees C, Sr0.7Ce0.3Fe11.7Zn0.3O19 achieved optimal magnetic properties of Ms = 58.24 emu/g, Mr/Ms = 0.95, Hc= 1816 Oe, Ha= 10433 Oe and K1 = 1.51 x 105J/m3. This work demonstrates that the magnetic properties of M-type hexagonal strontium ferrite can be significantly improved by optimizing the pre-sintering temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Sana Ullah Asif et al.
Summary: Ba0.8In0.2Fe12-xNixO19 (x = 0.00-2.00) hexaferrites were prepared by the ceramic route to study the effect of ferromagnetic dopant Ni on structure and magnetic properties. XRD and SEM were used to determine the microstructural properties, with grain size ranging from 500 to 2000 nm. VSM findings showed that magnetic saturation increased to 58.36 emu/g with ferromagnetic nickel doping. The coercivity values showed only slight change within a defined range from 5.129 kOe to 5.512 kOe. The magnetocrystalline anisotropy constant and anisotropy field increased with doping concentrations and then dropped for x =2.0. The synthesized material has a magnetic moment per formula unit with an upper limit of 11.603, making it a promising candidate for magnetic applications.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Y. Noratiqah et al.
Summary: The BaFe12O19/Y3Fe5O12 nanocomposite magnet film with varying soft phase composition has been synthesized and characterized. The addition of soft phase enhanced the magnetic properties and magnetic energy product of the nanocomposite film, with the best performance observed at 10% soft phase composition. The microstructural analysis revealed changes in phase composition, crystallinity, and grain size with increasing soft phase content. The results suggest that the exchange-interaction between soft and hard phase grains contribute to the improved magnetic properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Multidisciplinary
Sana Ullah Asif et al.
Summary: The effect of sintering temperature on the structural and magnetic properties of BaFe9.95Al2Mg0.05O19 M-type hexagonal Ba-hexaferrites was investigated. The results showed that as the sintering temperature increased, the saturation magnetization and remanence ratio initially increased, then decreased at higher temperatures, while the coercivity and magnetocrystalline anisotropy field decreased first, then increased. The optimal magnetic properties were achieved at a pre-sintering temperature of 1280 degrees C.
Article
Physics, Multidisciplinary
Annarose J. Palliyan et al.
Summary: This paper presents a comprehensive study on the structure-property correlations of strontium-substituted barium hexaferrite and their suitability for applications at room temperature. Various physicochemical characterization techniques were used to characterize a series of samples synthesized by the sol-gel auto-combustion technique. The results showed that proper tuning of the structural properties can result in optimal magnetic properties, making them suitable for permanent magnet and room-temperature magnetic device applications.
Article
Chemistry, Physical
Lin Sha et al.
Summary: Researchers have developed a simple method to create regular mesh-like gullies on the surface of zinc foil, which preferentially facilitates the deposition and stripping of zinc ions to maintain a flat outer surface. This approach improves the cycle life and capacity retention of zinc ion batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Qingwei Guo et al.
Summary: This study investigates the structural transformation and strain localization of Al0.3CoCrFeNi high-entropy alloy during nanoindentation using molecular dynamics, and discusses the hardening-softening mechanism. The simulations reveal the discovery of a prismatic dislocation loop with independent nucleation in the [111] orientation for the first time. Dislocation multiplication and cross-slip lead to work hardening, while free dislocation slip and annihilation cause plastic softening. Twin boundaries contribute to hardening but can also cause softening effects in the later stage of plastic deformation due to the formation of steps and local damage zones.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Indu Sharma et al.
Summary: In this study, BaYxFe12-xO19 was synthesized using citrate precursor technology with x values of 0.0, 0.1, and 0.2. Fourier Transform Infrared and UV spectroscopy, as well as Powder X-ray Diffraction, were used to determine the structure and confirm the phase formation. The magnetization versus magnetic field data showed an increase in magnetization value from 8.77 emu/g to 26.22 emu/g with the increase in doping concentration from x = 0.0-0.20. The antimicrobial activity of Y-doped BaFe12O19 against Staphylococcus aureus and Escherichia coli was observed at all concentrations, with MIC values ranging from 0.55 to 0.80 mg/ml. Therefore, this study explores the potential applications of Y-doped Barium hexaferrites in biomedical applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Somnath Sahu et al.
Summary: Sr-doped nano Ni-Co ferrite (NCFO) materials were synthesized using high-energy ball milling, and the microwave absorption performance of the materials was systematically studied. It was found that the saturation magnetization (Ms) decreased with increasing Sr concentration, except for NCFOS2, which had the highest Ms value of 60 emu/g. The magnetic parameters such as remanent magnetization, coercivity, and anisotropic constant showed a similar trend, increasing up to NCFOS2 and then decreasing. The correlation between lattice strain and magnetic parameters was established, and the electromagnetic wave parameters were recorded in the Ku band. The NCFOS2 material exhibited a maximum reflection loss (RL) of -35.59 dB at 17.74 GHz with a thickness of 3 mm, indicating its promising potential as a microwave absorber.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
A. R. Makhdoom et al.
Summary: In this study, M-type hexaferrites with different dopants were synthesized using a conventional solid state reaction technique. The structure, morphologies, and magnetic behavior were examined. The results showed that the saturation magnetization values decreased while the coercivity increased with the incorporation of dopants. The Ba0.6Sr0.4Fe9.5Ce1Al1.5O19 hexaferrite achieved the highest coercivity value.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Multidisciplinary
Caijiang Lu et al.
Summary: This paper proposed a split-core magnetoelectric current sensor with high detection sensitivity and stability for wireless measurement of 50 Hz current. The novel design concept provides a new idea for online current monitoring of the Internet of Things in power systems.
Article
Chemistry, Multidisciplinary
Haihui Yu et al.
Summary: A new type of composite photocatalyst PMo12/AgNPs was successfully constructed by combining silver nanosheets with polymolybdate (PMo12), exhibiting efficient visible-light response and photocatalytic activity. The hybrid material showed excellent interfacial charge transfer efficiency and potential application in photocatalysis. The photodegradation experiment demonstrated the high catalytic activity of PMo12/AgNPs under simulated visible light.
Article
Materials Science, Multidisciplinary
Yuhong Zhao et al.
Summary: The core-shell structure precipitates of Fe-xCu-3.0Mn-1.5Ni-1.5Al alloys under internal and external strain were investigated. Results showed the existence of four core-shell structures in precipitation, and the interaction between external strain and Mn, Ni, and Al promoted the joining and merging of adjacent core-shell particles.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yuhong Zhao
Summary: This study investigates the formation paths, diversity patterns, segregation modes, and magnetic effect of Ni/Mn shell-coated Cu-rich particles in Fe-15at. % Cu-1at. %Mn-1at. %Ni alloy using the phase-field method. The research reveals the coexistence of three nucleation mechanisms and the appearance of four structural patterns during precipitation, growth, and coarsening. The Cu-rich nanoparticles transform from bcc-a-Cu to fcc-g-Cu, while the Ni/Mn shell remains bcc and precipitates on the surface of bcc-a-Cu, fcc-g-Cu, or both. The Ni/Mn shell inhibits crystal structure transformation and phase separation. Adjusting aging time, magnetic field, and elastic field conditions can yield different microstructures and mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Gara Kishor et al.
Summary: Doping of various ions in M-type BaFe12O19 hexaferrite has been achieved through mechanical alloying and heat treatment, resulting in changes in structural phase, crystallite size, lattice strain, and magnetic moment.
Article
Multidisciplinary Sciences
Jianfa Zhao et al.
Summary: The A-site-ordered perovskite PbHg3Ti4O12 is the only known quadruple perovskite that undergoes a phase transition from a high-temperature centrosymmetric paraelectric phase to a low-temperature non-centrosymmetric ferroelectric phase under high pressure synthesis. It bridges the gap between simple ABO(3) perovskites and A-site-ordered AA'3Ti4O12 perovskites, exhibiting both displacive ferroelectricity and unique structural coordination.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Condensed Matter
Meshal Alzaid
Summary: This study focuses on the synthesis of rare earth lanthanum-doped manganese in barium hexaferrite using the coprecipitation method. It was found that increasing the concentration of lanthanum can enhance crystallinity and increase crystallite size, while decreasing the band gap energy. Agglomeration was observed due to heat behavior at 600 degrees C or concentration effect. Structural studies were carried out using X-ray diffraction, UV, FT-IR, and SEM techniques.
ADVANCES IN CONDENSED MATTER PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
T. L. Phan et al.
Summary: Polycrystalline SrCo1.2Fe10.8O19 (SCFO) and SrMn1.2Fe10.8O19 (SMFO) samples were prepared using the normal ceramic technique and showed crystallization in the M-type hexaferrite structure. Analysis revealed the existence of different oxidation states of transition metal ions in both samples, influencing their magnetic properties and microwave shielding ability. SCFO exhibited the lowest reflection loss and high absorption at specific frequencies, making it a potential candidate for microwave shielding applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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Review
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Preeti Thakur et al.
CERAMICS INTERNATIONAL
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
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Review
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Hsing-I. Hsiang
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
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N. Pavan Kumar et al.
MATERIALS RESEARCH EXPRESS
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Proceedings Paper
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MATERIALS TODAY-PROCEEDINGS
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Ghulam Abbas Ashraf et al.
CERAMICS INTERNATIONAL
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R. E. El Shater et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
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M. Maria Lumina Sonia et al.
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Y. Slimani et al.
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