Cation distribution by Rietveld technique and magnetocrystalline anisotropy of Zn substituted nanocrystalline cobalt ferrite

Magnetic, electric and thermal properties of cobalt ferrite nanoparticles

“…In case of cobalt ferrite with two valence states for cobalt, Co 3+ cations occupy exclusively octahedral sites and Co 2+ cations are on tetrahedral sites. Recently, Kumar et al [33] showed that in case of nanocrystalline materials, this does not hold anymore. One way to obtain information about cation distribution is to consider the relative intensity of the (220), (222) and (422) Table 2 as a function of x, the cobalt content.…”

Enhanced magnetic properties of doped cobalt ferrite nanoparticles by virtue of cation distribution

“…Effect of Mn doping on cobalt ferrite nanoparticles demonstrates the existence of both ferromagnetic and superparamagnetic phases separated by blocking temperature that decreases with increase in Mn content [12]. Fluctuations of magnetic moment and anisotropy constant have been observed while Zn is doped in cobalt ferrite [13]. It was reported earlier that the cationic distribution for nanophase cobalt ferrite was different from its bulk counterpart [14].…”

“…introduce some important structural changes which lead to interesting physical properties like saturation magnetization, remnant magnetization, electrical conductivity etc. [10][11][12][13]. These changes depend on the distribution of cations between the two interstitial sites of spinel ferrites and their valence states.…”

Synthesis of a low loss Mn–Zn ferrite for power applications

“…Moreover, the increase of the Zn content influences the anisotropy of the Mn-Zn ferrite and the point where the K 1 constant crosses zero is shifted to a lower temperature [15]. Regarding the increase of the initial permeability, it is owed to the non-magnetic nature of Zn which occupies the A-sites in the crystal lattice, increasing the effective magnetic moment and, thus, the magnetization M, since it is equal to M B -M A of the sublattices [16].…”