Spectroscopic and electrical properties of Mg–Ti ferrite doped with different rare-earth elements

Effect of Tb substitution on structural, magnetic and electrical properties of magnesium ferrites

“…The band positions are tabulated in Table 2. The range of absorption bands obtained is in good agreement to the reported literature [19]. It is observed that n 2 band is shifted towards lower frequencies with an increasing amount of terbium ions.…”

Role of Coupling Divalent and Tetravalent Metal Ions on the Elastic and Electric Properties of CoFe2O4 Ferrites Prepared by Sol–Gel Method

“…The ν 3 band is observed in the range 330-337 cm −1 . Similar IR spectra have been observed in literature for rare earth element doped in Mg-Ti ferrites [14]. Values of the three vibrational bands (ν 1 , ν 2 , and ν 3 ) are present in Table 2.…”

Effect of Sintering Time on the Structural, Magnetic and Electrical Transport Properties of Mg<sub>0.35</sub>Cu<sub>0.20</sub>Zn<sub>0.45</sub>Fe<sub>1.94</sub>O<sub>4</sub> Ferrites

“…ε′ increases as the temperature increases which is the normal dielectric behaviour magnetic semiconductor ferrites. The increase in ε′ with temperature was earlier observed for the Mg-Ti [35], Ni-Zn [36,37], Li 0.5 Fe 2.5 O 4 [38], Mg-Zn [39] ferrites. The hopping of electrons between Fe 2+ and Fe 3+ ions (at adjacent B-sites) is thermally activated on increasing the temperature.…”

“…35 µ′ − iµʺ where, µ′ is the real permeability (in phase) and µ′′ the imaginary permeability (90˚ out of phase). The real part of the permeability µ′ shows flat profile from 1 kHz to 5 MHz indicating good low frequency stability for the samples for t s = 1 h and 2 h and the dispersion occurs slightly above 5 MHz frequency due to relaxation of µ′.…”