Self-propagating high temperature synthesis, structural morphology and magnetic interactions in rare earth Ho3+ doped CoFe2O4 nanoparticles

Impact of Nd3+ in CoFe2O4 spinel ferrite nanoparticles on cation distribution, structural and magnetic properties

“…The allied parameters such as tetrahedral and octahedral bond length (d Ax and d Bx ), tetrahedral edge (d AxE ), shared and unshared octahedral edge (d BxE and d BxEU ) for CoFe 2 À x Nd x O 4 (x ¼0.0, 0.025, 0.05, 0.075 and 0.10) nanoparticles are calculated by using the observed values of lattice constant 'a' and oxygen positional parameter 'u' (0.375) and substituting in following equations [19]:…”

Microwave Assisted Synthesis and Characterization of CoxZn1−xCr0.5Fe0.5O4 Nanoparticles

“…The substitution of trivalent ions like Cr 3? is likely to increases the resistivity and decreases the saturation magnetization (Cr-substitution is expected to reduce the exchange interaction between A-and B-sites since it has preferential octahedral site occupancy) [17,[35][36][37][38]. It has been reported that the saturation magnetization (Ms), remanent magnetization (Mr), and coercive force (Hc) decreases monotonously when an appropriate amount of Cr 3?…”

DC Electrical Resistivity, Dielectric, and Magnetic Studies of Rare‐Earth (Ho3+) Substituted Nano‐Sized CoFe2O4

“…This is due to the larger ionic radii, the presence of unpaired 4f electrons and magnetocrystalline anisotropy that is instigated by 4f–3d coupling due to exchange interaction . Literature report on substitution of Ho 3+ ions in CFO which reveal enhanced saturation magnetization and coercivity with the rare earth Ho 3+ substitution which may probably be due to the larger magnetic moment of Ho 3+ ions and enhanced exchange interaction . Studies also revealed a significant increase in dielectric constant with a very low loss factor at high frequency region in Ho 3+ doped CFO samples .…”