FT-IR Studies of Cu Substituted Ni-Zn Ferrites for Structural and Vibrational Investigations

Abstract

Polycrystalline ferrite samples having a chemical formula Ni 0.7-x Cu x Zn 0.3 Fe 2 O 4 (where x=0.05 to 0.50 insteps of 0.05 variation) was prepared through the conventional ceramic method. The infra red spectra were recorded at the room temperature using FT-IR spectra for all samples in the range 4000 cm-1 to 400 cm-1 on MAGNA 550 Nicollet Instruments Corporation; the absorption spectra recorded 400 cm-1 to 4000 cm-1. The spectrum recorded transmittance (%) versus wave number (cm-1) and the spectrum confirms the spinel structure. The study of FT-IR spectra is very important tool for getting the ions positions in the lattice.

FT-IR Studies of Nickel Substituted Polycrystalline Zinc Spinel Ferrites for Structural and Vibrational Investigations

“…It was also found that, the Fe-O bond distance of the T d sites (0.189 nm) and this is smaller than that of the O h sites (0.199 nm) 33 . The change in the frequency band position is due to perturbation occurring in the Fe-O inter nuclear distances 19,23 . This has been interpreted due to the more covalent bonding of the Fe ions at T d sites.…”

“…The positions of absorption bands in terms of wave number ν T and ν O for all samples are summarized in Table 1. 19 . The results show the compositional dependent behavior of force constant are attributed to the cation oxygen bond distances 1 .…”

“…The electrical and magnetic properties of spinels depend on the chemical composition, cation distribution and the method of preparation. The vibrational, electronic and magnetic dipole spectra can give information about the position and valency of the ions in the crystal lattice 19 . In a certain mixed spinel ferrites, as the concentration of the divalent metal ions increasing, it gives rise to the structural change in spinel lattice crystal without affecting the spinel ferrite structure 21 .…”

“…The room temperature FT-IR spectra of the prepared Ni 1-s Zn s Fe 2 O 4 samples were recorded between the wave numbers 350 cm -1 to 1000 cm -1 , which is a common feature of ferrites as shown in Figure 2 19,20,27,28,31,32 . It was also found that, the Fe-O bond distance of the T d sites (0.189 nm) and this is smaller than that of the O h sites (0.199 nm) 33 .…”

“…have been intensely studied because of their remarkable high-frequency operation (1-100 GHz) as well as because of their favorable properties such as low eddy current losses and high of resistivity, permeability, Curie temperature and saturation magnetization in the radio frequency (RF) region [11][12][13][14] . Therefore, it plays a significant role in many applications 1,11,[13][14][15][16][17][18][19] . The structure of …”