FTIR spectra and elastic properties of Cd-substituted Ni–Zn ferrites

Resumo

Solid solutions Ni_0.5–xCd_xZn_0.5Fe₂O₄ (x = 0, 0.15, 0.30) were prepared by solid-state synthesis and characterized by FTIR spectroscopy. The FTIR spectra of synthesized ferrites showed two absorption bands (ν₁ and ν₂) in the range 400–600 cm^–1 belonging to tetrahedral (A) and octahedral (B) interstitial sites in the spinel lattice. The force constants for tetrahedral (K_t) and octahedral sites (K_o) were determined, as well as Young’s modulus (E), rigidity modulus (G), bulk modulus (B), Debye temperature (Θ_D), and velocity of transverse (V_t) and longitudinal (V_l) elastic waves. The relevant interionic cation–anion, cation–cation distances and bond angles are also reported.