Structural, electrical and magnetic properties of Co–Cu ferrite nanoparticles

Investigation of Structural, Morphological, Magnetic Properties and Biomedical applications of Cu2+ Substituted Uncoated Cobalt Ferrite Nanoparticles

“…The peak shift can be seen from the corresponding reflection angles, it was due to increase in Cu 2+ substitution in CoFe 2 O 4 nanoparticles. The lattice constant (A 0 ) starts increases with increasing copper substitution [7,14] . The increase in lattice constant with copper substitution was may be due to the occupying nature of copper ions in positions of Fe 3+ ions.…”

“…The increase in lattice constant with copper substitution was may be due to the occupying nature of copper ions in positions of Fe 3+ ions. The copper ions ionic radii are about 0.70A 0 which is greater than the ionic radii of Fe 3+ ions ions which is only about 0.67A 0 [7,15] . The above mentioned occupying phenomena of Cu 2+ results in peak shift.…”

“…The reduction in saturation magnetization may be due to existence of large nonmagnetic Cu 2+ ions in B positions which reduces the interaction between A and B positions [7,17] . The super exchange interaction mechanism between the sub lattices (A-B) and intra sub lattices (A-A) and (B-B) takes place in the chemical compositions.…”

“…Hence the Co ion in A sub lattice will be gradually shifted which results in weakening of B-B interaction. Thus, the saturation magnetization was found to be decrease with Copper ion substitution in Cobalt ferrite nanoparticles [7,18] . The observations using scanning electron microscope shows the size, morphology and structural composition of synthesized magnetic nanoparticles.…”

“…During magnetic nanoparticle preparation processes, the parameters such as particle grain size, chemical ratio of additives, sintering temperature, doping ratio and preparation method play vital role in tuning the properties of spinel ferrites which can be used for different applications. Among transition metal substituted compositions, CoFe 2 O 4 is a hard magnetic material which has considerable attention of technical community due to its peculiar enhanced magnetic properties such as high saturation magnetization, high density audio and video recording media, for controlled drug delivery, radio frequency hyperthermia, magnetic resonance imaging and medical diagnostics [7,8] . The transition metal substitutions in CoFe 2 O 4 such as Mn, Cu, Zn, Ni, etc., play an important role in enhancing physical properties like magnetic and electrical properties of spinel ferrites [9] .…”