Development of Multi-Cation-Doped M-Type Hexaferrite Permanent Magnets

Article Chemistry, Multidisciplinary

Enhancement of the Magnetic Properties in Si4+-Li+-Substituted M-Type Hexaferrites for Permanent Magnets

Jin-Young You et al.

Summary: In this study, charge-balanced Si4+-M-1+,M-2+ substitution compositions were synthesized and found to enhance the magnetic performance of SrFe12-2xSixMgxO19 and SrFe12-z(Si0.6Li0.6)(z)O-19 compounds.

APPLIED SCIENCES-BASEL (2022)

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Article Chemistry, Inorganic & Nuclear

Sol-gel auto-combustion synthesis of double metal-doped barium hexaferrite nanoparticles for permanent magnet applications

Sachin Kumar Godara et al.

Summary: In this study, BaZnxZrxFe12-2xO19 (x = 0.00-0.15) sub-micron particles were successfully synthesized using the solgel auto-combustion technique. The effects of dopant concentration on grain size, magnetic properties, and surface morphology were investigated.

JOURNAL OF SOLID STATE CHEMISTRY (2022)

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Proceedings Paper Materials Science, Multidisciplinary

Enhancement of coercivity of M-type barium hexaferrite by Ho doping

Murli Kumar Manglam et al.

Summary: The present study investigates the structural and magnetic properties of Ho doped barium hexaferrite. The results show that the average crystallite size decreases and the saturation magnetization decreases while the coercivity increases with the increase in Ho concentration. The magnetic parameters of barium hexaferrite depend on Fe-O-Fe superexchange interaction and average crystallite size.

MATERIALS TODAY-PROCEEDINGS (2022)

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Article Physics, Applied

Co-Al-substituted strontium hexaferrite for rare earth free permanent magnet and microwave absorber application

Sagar E. Shirsath et al.

Summary: In this study, the magnetic properties of Sr0.8Ca0.2AlxCoxFe12-2xO19 hexagonal ferrites were improved through Co2+-Al3+ substitution. These ferrites show great potential as rare earth-free magnets with improved saturation magnetization, coercivity, and microwave absorption characteristics. This research highlights the possibility of using hexagonal ferrites as alternatives to rare earth-based permanent magnets.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2021)

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Article Physics, Applied

Ce-Dy substituted barium hexaferrite nanoparticles with large coercivity for permanent magnet and microwave absorber application

G. B. Todkar et al.

Summary: Ce-Dy ion-doped M-type barium hexaferrites exhibit good microwave absorption properties, with an improvement in crystallite size. The introduction of Ce-Dy ions enhances the coercivity of BaM hexaferrites.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2021)

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Article Materials Science, Multidisciplinary

Structure and magnetic properties of the porous Al-substituted barium hexaferrites

Guanghui Han et al.

Summary: Ion substitution is an efficient approach for improving the magnetic properties of barium hexaferrites. In this study, BaFe12-xAlxO19 materials were fabricated and it was found that coercivity is greatly affected by annealing temperature and Al3+ content. Mossbauer spectroscopy revealed Al3+ substitution sites and superparamagnetic components in some samples.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2021)

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Article Materials Science, Multidisciplinary

Development of a High-Performance-Ferrite Magnet Fabrication Process without Sintering Additives

Pyeong-Yeol Yu et al.

Summary: In this study, sintered M-type hexaferrites were successfully prepared with high sintering density, and it was found that replacing part of Co with Mn at a certain composition can achieve high saturation magnetization and coercivity. By adjusting the Fe content, the generation of secondary phase Fe2O3 can be reduced, improving the purity and performance of M-type hexaferrites.

KOREAN JOURNAL OF METALS AND MATERIALS (2021)

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Article Chemistry, Multidisciplinary