Structural study of Ni_XMg_1–XFe₂O₄ferrites

Electrical Resistivity at the Curie Point for Some Mixed Ferrites

“…The values of the electrical resistivity (e) at the Curie temperature (T,) are listed in Table 1 for the four studied ferrite systems, respectively. It is well known that at the Curie temperature where the samples transform from ferrimagnetic to paramagnetic state, there is a marked and obvious transformation in the values of the electrical resistivity [5,9, 10, 121 of the studied ferrite systems which are in good agreement with the published results [3, 6, 15, 161. The results in Table 1 indicate that the electrical resistivity for all the studied samples has a value e > 10 Rcm at the Curie point.…”

AC electrical conductivity of Ni - Mg ferrites

“…The analysis of x-ray diffraction data indicated that the Ni x Mg 1−x Fe 2 O 4 samples in this study have a single-phase cubic spinel structure [7]. This work was performed at the Physics Department, Tanta University, Egypt.…”

“…A series of Ni x Mg 1−x Fe 2 O 4 ferrite samples with O ≤ x ≤ 1 were prepared in the form of discs using the double-sintering ceramic technique mentioned earlier [7]. The experimental technique for the measurements of AC electrical conductivity was explained before [10].…”

“…The AC electrical conductivity has been studied for Ni-Zn ferrites [3][4][5]. The DC electrical conductivity [6] and structure [7] have been studied for Ni-Mg ferrites. For MgFe 2 O 4 , IR and Raman spectroscopy [8] and the effect of microstructural characteristics on the electrical conductivity [9] have been studied.…”