Magnetic properties of nanocrystalline Ni–Zn ferrites doped with samarium

Effect of Sm3+ ions doping on structure and magnetic properties of nanocrystalline NiFe2O4 fibers

“…Sm 3+ ions doping has effect on suppression of the grain growth and the crystallite sizes for NiFe 2−x Sm x O 4 fibers decrease with increasing of Sm contents as showed in Fig. 6, which is in agreement with the results of literature [29,30]. The effect of Sm 3+ ions doping on crystallite sizes can be explained as follows.…”

Influence of rare-earth ions on structural and magnetic properties of CdFe2O4 ferrites

“…Rezlescu et al [23] reported that the saturation magnetization of Gd 3+ and Er 3+ substituted Ni-Zn ferrites is higher than that of unsubstituted ferrite. Similar results are reported by Liu et al [26] in La 3+ substituted M-type strontium ferrite and Gama et al in samarium-doped Ni-Zn ferrite [33]. This rise in saturation magnetization of R ions added cadmium ferrite may be due to enhancing effect of the inter-sublattice exchange energy between Cd-O-R and Cd-O-Fe with respect to the Fe-O-Fe interaction in the ferrite lattice [13].…”

Effect of Tb substitution on structural, magnetic and electrical properties of magnesium ferrites

“…Also no more Fe 3+ ions are transferred to the octahedral sites which lead to the decrease of saturation magnetization. The decrease of saturation magnetization by the addition of rare earth ions in other ferrites has also been reported [25]. The site occupancy of Mg 2+ and Fe 3+ ions in MgTb ferrites is complicated; however, the decrease of saturation magnetization for higher concentration of Tb 3+ ions may be attributed to the secondary orthoferrite phase (TbFeO 3 ), which has a low value of magnetization.…”