The Role of Rare Earth (Y) Ions on the Structural, Magnetic and Mechanical Properties of Co–Mg Nanoferrites

The current paper is an effort to investigate the impact of rare earth yttrium on magnetic and mechanical properties of novel Co–Mg–Y nanoparticles. A series of ferrite nanoparticles, with a constant amount of cobalt and magnesium, substituted with various amounts of Y 3+ as Co 0.7 Mg 0.3 Y x Fe 2- x O 4 (labeled as CMYF nanoferrites) were prepared and studied. The prepared CMYF samples were well investigated for structure and morphology utilizing x-ray diffraction (XRD), high-resolution transmission electron microscope (HR-TEM), and Fourier-transform infrared (FTIR) analysis. The crystallite size of CMYF nanoferrites introduced an abnormal behavior with further Y 3+ substitution, ranging from 33.33 to 66.89 nm. The nanoferrite Co 0.7 Mg 0.3 Y 0.08 Fe 1.92 O 4 ( x = 0.08) has the highest coercivity (1410 G) within all CMYF samples, with increasing ratio 36.10% than the pristine Co–Mg nanoferrite. Also, the nanoferrite Co 0.7 Mg 0.3 Y 0.1 Fe 1.9 O 4 ( x = 0.1) has the highest resistance to uniform compression with increasing ratio 8.21% than the pristine nanoferrite. Shear and Young moduli introduced a peculiar trend: decrease regularly for 0.0 ≤ x ≤ 0.08 and then increase for the nanoferrite with x = 0.1. Poisson’s ratio values confirmed that all CMYF nanoferrites are stable, isotropic, and linear elastic materials. Hosselman and Fulrath’s model was utilized to correct elastic moduli to zero porosity, which confirmed that porosity is a significant parameter for CMYF nanoferrite elastic moduli determination. Therefore, we conclude that Co 0.7 Mg 0.3 Y 0.08 Fe 1.92 O 4 nanoferrite can be utilized in storage media applications and Co 0.7 Mg 0.3 Y 0.1 Fe 1.9 O 4 nanoferrite in diverse ferrite standard mechanical applications.