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Article
Materials Science, Multidisciplinary
Anjali Thakur et al.
Summary: Dysprosium and Indium doped Co2Z hexaferrite Ba3Co2InyDyxFe23.9-xO41 samples were prepared by sol-gel auto-combustion method. The structural studies confirmed the presence of a pure Z-type phase using XRD and TEM. Magnetic studies using Vibrating Sample Magnetometer and Mossbauer Spectroscopy revealed that Ba3Co2In0.1Dy0.2Fe23.7O41 has the highest saturation magnetization value of 89.065 emu/g. Mossbauer spectra fitting showed the presence of Fe3+ state in the sample and minimal deformation in lattice sites due to doping with Dysprosium and Indium dopants.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Ceramics
Sukhbir Singh et al.
Summary: The present work systematically explores the impact of La substitution on the solubility range of Lanthanum in the Sr3Co2Fe24O41 structure. La substituted hexaferrites Sr3-xLaxCo2Fe24O41 were prepared and characterized using XRD, TEM, and SEM. The results indicate a limit of La solubility in Sr3-xLaxCo2Fe24O41 at x = 0.45. The dielectric properties of the samples exhibit frequency-dependent and thermally stimulated behavior. With increasing La substitution, the saturation magnetization decreases and coercivity increases, indicating an increase in magnetic hardness. Weak magneto-electric coupling is observed in the SCFO sample.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Yida Lei et al.
Summary: Hexagonal ferrite Ba3Co2Fe24-xTixO41 (x = 0.0-0.6) was synthesized and its magnetic and dielectric properties were investigated. The samples were mainly Z-type hexagonal ferrite and had a typical hexagonal structure. With the increase of TiO2 addition, the grain size decreased and the magnetic properties improved. When x = 0.2, the material exhibited high magnetic permeability and dielectric permittivity with low magnetic and dielectric losses in a specific frequency range. Ti4+-substituted Co(2)Z ferrites were found to be suitable for high-frequency antenna and filter applications.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yu Lei et al.
Summary: Rare earth dysprosium-doped Z-type hexaferrite with uniform particle size and hexagonal flake shape were synthesized by the sol-gel method. The samples exhibit excellent soft magnetic properties, with saturation magnetization increasing gradually with the amount of Dy doping. Trace doping of dysprosium significantly improves the microwave absorption properties of Z-type hexaferrite, with a sample doped at x = 0.05 showing an exceptional reflection loss value of -52.6dB at 5.25 GHz and a maximum effective absorption bandwidth of 6.6 GHz, covering both C-band and X-band. Excessive doping leads to impurity phase generation and reduction in magnetic properties and microwave absorption, highlighting the importance of appropriate Dy3+ doping for enhancing the microwave absorption property of Z-type hexaferrite.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
P. Neelima et al.
Summary: In this study, dysprosium-substituted Mn-Zn ferrites were synthesized and the effect of Dy3+ substitution on the structural, electrical and magnetodielectric properties of Mn-Zn ferrites was examined. It was found that for lower concentrations of Dy3+, the prepared ferrites had a single spinel phase structure, while a minor phase of DyFeO3 appeared for higher concentrations. The electrical properties showed an increase in resistivity with Dy3+ substitution. The magnetodielectric properties showed significant changes with the amount of Dy3+ present, indicating that Dy3+ substitution can be used to tune the electrical and magnetodielectric properties of Mn-Zn ferrites.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Jian Wu et al.
Summary: In this study, Ba3Co2Fe24-xSmxO41 materials were prepared using low temperature-fired process, showing superior magnetic-dielectric properties in high-frequency range, making them suitable for high-frequency antenna applications.
CERAMICS INTERNATIONAL
(2023)
Review
Crystallography
Ibrahim Mohammed et al.
Summary: This review provides a detailed overview of hexagonal ferrites and their composites for microwave absorption applications. It covers their classifications, synthesis methods, strategies for improving magnetic properties, as well as their composites with conducting polymers, 2D materials, and other nanomaterials. The review also discusses the enhancement of microwave absorption in hexagonal ferrites-based microwave absorption materials (MAMs), their limitations, challenges, and opportunities, providing valuable insights for researchers in related areas.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Ngo Tran et al.
Summary: This study investigated the application of La-substituted barium hexaferrite in microwave absorption performance. The experimental results showed that doping with different concentrations of La can tune the magnetic properties and microwave absorption features of the material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Qinhua Li et al.
Summary: With the development of modern communication technology, the requirements for antennas are becoming higher, demanding smaller and lighter materials. This study successfully synthesized a series of magneto-dielectric ferrite materials and investigated the effects of Fe substitution on their properties. It was found that with a relatively low substitution amount, these materials exhibited characteristics suitable for antenna miniaturization.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Yu Lei et al.
Summary: Rare earth dysprosium-doped Ba3Co2Fe24-xDyxO41 (x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10) Z-type hexaferrites were prepared by the sol-gel method. The effects of Dy doping on the crystal structure, morphology, magnetic properties, and electromagnetic wave absorption performance were investigated. The results showed that increasing the Dy doping amount improved the saturation magnetization and soft magnetic properties of the material. The material with an x value of 0.04 exhibited the best microwave absorption performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jinhui Liu et al.
Summary: The study investigated Co(2)Z hexaferrite/Fe soft magnetic composites synthesized via the sol-gel method, finding that Co(2)Z hexaferrites filled the air gaps between Fe powders, increasing the density of the composites and effectively improving the soft magnetic performance at middle to higher frequencies.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Xingyu Huo et al.
Summary: The research found that appropriate Zn substitution can improve the densification and saturation magnetization of Z-type ferrite, effectively promoting permeability. However, high-frequency magnetic properties are found to be affected due to limitations of Snoek's law.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Anoop Pratap Singh et al.
Summary: The study found that La3+ substitution significantly affects the hopping and relaxation mechanism of charge carriers, as evidenced by frequency-dependent imaginary impedance and electric modulus. Arrhenius plots showed parallel conduction mechanism in the system. The complex electric modulus spectrum distinguished the capacitive contribution of grain, grain boundary, and electric effect.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Applied
Anoop Pratap Singh et al.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2020)
Article
Materials Science, Multidisciplinary
Dangwei Guo et al.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Dangwei Guo et al.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Woncheol Lee et al.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2016)
Article
Materials Science, Multidisciplinary
Haibo Yang et al.
Article
Materials Science, Multidisciplinary
Xiaozhi Zhang et al.
MATERIALS RESEARCH BULLETIN
(2015)
Article
Physics, Applied
Jae-Sik Kim et al.
MODERN PHYSICS LETTERS B
(2009)
