Abstract
It is very important to study the structural properties of the material to understand the physical properties. According to suggested cations distribution of Ni–Al ferrite as the formula $$({\text{Fe}}_{1 - t}^{3 + } {\text{Al}}_{t}^{3 + } )\left\{ {{\text{Ni}}^{2 + } {\text{Al}}_{x - t}^{3 + } {\text{Fe}}_{1 - x + t}^{3 + } } \right\}{\text{O}}_{4}^{2 - }$$ , with ( $$0.0 \le x \le 0.5$$ ) and ( $$0.0 \le t \le 0.1$$ ), the structural parameters were studied. The cations radii of tetrahedral ( $$R_{{\text{T}}}$$ ) did not change, but octahedral ( $$R_{O}$$ ) sites decreased with increasing Al3+ ions. Lattice constants ( $$a_{{{\text{th}}}}$$ ) decreased with increasing Al content. The values of $$u^{{\overline{4}3m}}$$ changed over the ranged 0.3818538155, whereas the values of $$u^{{\overline{3}m}}$$ varied from 0.25685 to 0.25655. With increasing Al content, M–M lengths decreased, in addition, the bond lengths q, r, and s decreased except p. In addition, with increasing Al3+ ions, $$\theta_{1}$$ , $$\theta_{2}$$ , and $$\theta_{5}$$ decreased but $$\theta_{3}$$ and $$\theta_{4}$$ increased. $$d_{{{\text{TE}}}}$$ and $$d_{{{\text{TL}}}}$$ were constant, whereas $$d_{{{\text{OEu}}}}$$ , $$d_{{{\text{OL}}}} ,$$ and $$d_{{{\text{OE}}}}$$ decreased with increasing Al3+ ions. $$L_{{{\text{T{-}T}}}}$$ , $$L_{{{\text{O{-}O}}}} ,$$ and $$L_{{{\text{T{-}O}}}}$$ reflected the same behavior as that of $$a_{{{\text{th}}}}$$ , where they decreased with increasing Al3+ ions concentration. As a result, the incorporation of non-magnetic Al3+ ions into the given ferrite system reduces the strength of the magnetic interactions, which relates to the changing on structural parameters.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have