International Journal of Science, Engineering and TechnologyAuthors: Suhas Subramani, Dr.Srilatha Y
Abstract: – R₂Fe₁₇ (where R stands for rare earth or Y) intermetallics are fascinating iron-rich compounds known for their high saturation magnetization and intriguing physics that stem from competing exchange interactions, various Fe crystallographic sites, and structural polymorphism (think rhombohedral Th₂Zn₁₇ versus hexagonal Th₂Ni₁₇). This review dives into the structural chemistry, magnetic behavior, and the different methods used to tweak these properties, including substitution (with elements like Co, Al, Ga, Si), off-stoichiometry, nitriding/hydrogenation, nanostructuring, and processing techniques. We particularly highlight how substitution impacts the Curie temperature, magnetocrystalline anisotropy, magnetization, and magnetovolume effects, with a keen focus on the effects of Co/Ga/Si/Al substitution and the latest off-stoichiometric studies. The review also discusses representative experimental, neutron, and theoretical works, and includes a carefully curated bibliography of over 50 papers for researchers who are stepping into this exciting field.
DOI: https://doi.org/10.5281/zenodo.17120916
