Improving the ferromagnetic exchange coupling in hard τ-Mn53.3Al45.0C1.7 and soft Mn50B50 magnetic alloys

Scientific and technological analysis of exchange-spring magnets: Applications and trends

“…The article also explored the use of various techniques, including Henkel plots, recoil curve measurements, and SEM imaging, to analyze the dominant interactions in the systems. [ 61 ] Mn 53.3 Al 45 C 1.7 /Mn 50 B 50 (98/2 wt%) 69 36 0.373 9.79 The study found that the best magnetic properties were achieved when the powders were mixed in a specific ratio (98:2 wt%) and heat-treated at a specific temperature (673 K). This suggested that soft magnetic phases with a brittle character can be utilized as raw materials for exchange-spring magnets.…”

Physical and Magnetic Characterization of Hard/Soft SrFe₁₂O₁₉/CoFe₂O₄ Nanocomposite Magnets Made by Mechanical Alloying and Ultrasonic Irradiation

“…These two magnetic phases in a composite structure must have nanometer-sized crystallites with such magnetic properties. In order to provide the nanocomposite magnets with high Hc and Ms values through the magnetic spring effect, the soft magnetic phase must have a mean crystallite size twice the width of the domain wall of the hard magnetic phase [15]. Sahu et al [16] prepared M-type strontium hexaferrite (SHF), SrFe12O19, by a conventional ceramic route to obtain large SHF grains, and used the automatic combustion method to obtain small grains.…”