A study of magnetic properties of Y–Ni–Mn substituted Co2Z-type nanohexaferrites via vibrating sample magnetometry

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co2Z hexaferrites

“…where Z is the number of molecules per unit cell, M is the molecular weight, 𝑁 𝐴 is the Avogadro's constant, and V is the cell volume obtained by the refinement. 18 According to the data in Table 1, the reliability factors R wp and χ 2 have the small values, especially χ 2 (less than 1). This indicates the high accuracy of the fitting and the authenticity of the refinement data.…”

“…The established lattice parameters, cell volume, reliability factors, and theoretical densities of the substituted hexaferrite are listed in Table 1. Among them, the theoretical density was calculated as follows: $$$$\begin{equation}\ {\rho }_{{\rm{theo}}} = \frac{{ZM}}{{{N}_AV}}\ ,\end{equation}$$$$where Z is the number of molecules per unit cell, M is the molecular weight, $${N}_A$$ is the Avogadro's constant, and V is the cell volume obtained by the refinement 18 . According to the data in Table 1, the reliability factors R wp and χ 2 have the small values, especially χ 2 (less than 1).…”

“…Z‐type hexaferrite consists of basic blocks (R, S, T, R*, S*, and T*) stacked along the c‐axis. In particular, Fe and Co will occupy six octahedral sites with a coordination number of 6 (12 k VI , 4 f VI , 4 e VI , 4 f VI * , 12 k VI * , and 2 a VI ), three tetrahedral sites with a coordination number of 4 (4 e IV , 4 f IV , 4 f IV * ), and one five‐fold site with a coordination number of 5 (2 d V ) 18,20 . The polyhedral structures with different coordination number are also shown in Figure 3.…”

An Overview of Hard Ferrites: Types and Structures

“…When the Y-type ferroxolana hexaferrites were discovered, the Z-type hexaferrites with the chemical composition Ba3Me2Fe24O41 were discovered at the same time. Where 'Me' represents the divalent metal cations, and moreover, it has parallel uniaxial anisotropy corresponding to the c-axis and a-axis, respectively [31]. At low temperatures, Z-type hexagonal ferrite exhibits a simple cone magnetization, with a 65° magnetization angle matching to the c-axis.…”

Spinel Ferrite Based Nanomaterials for Water Remediation Application

“…An alternative study showed that adsorption through the method of ion-exchange and electrostatic attraction were the key adsorption mechanisms for copper ion adsorption on the surface of EDTA functionalized silica-coated Fe3O4 [54]. Results from the adsorption analysis on many spinel ferrite nanoparticles indicate electrostatic activity and ion-exchange as the key adsorption mechanism for cationic dyes, because surfactant groups are present on these nanoparticles [55,56]. One way to imagine this is to think about extracting MB and Congo red together in the presence of MnFe2O4 nanoparticles.…”