Structural, optical and conductivity investigations on κ-Al2O3 ceramics for powder metallurgical production and sensitivity applications

Nanostructured Fe,Co-Codoped MoO3 Thin Films

“…Further, we calculated the lattice parameters a , b and c from the d hkl values presented in Table 1 using the following relation [34]:1dhkl2=h2a2+k2b2+l2c2 and the texture coefficient TC ( hkl ), which gives the preferred orientation of the film, with the following relation [20,35,36]:TC(hkl)=I(hkl)/I0(hkl)N−1∑nI(hkl)/I0(hkl) where I ( hkl ) and I 0 ( hkl ) are the measured and the standard intensity of the plane ( hkl ), respectively, and N is the reflection number.…”

“…The best crystallinity is obtained for MoO 3 : Fe 2%-Co 1% with preferentially orientation along (020) direction. The effect of Fe-Co dopants on the MoO 3 crystal lattice can be further analyzed by studying the crystallite size ( D ), the stress ξ and dislocation density δ dis [35,37,38,39,40] with doping, according to the following equations:D=kλβ1/2cosθ ξ=βcosθ4 δdis=1D2 where k is the Scherrer constant ( k = 0.90), β 1/2 is the half width of the peak (corrected value). Table 3 presents the values obtained D , ξ and δ dis along (020) calculated using Equations (4)–(6).…”

Magnetic Properties of Hausmannite Thin Films

“…Furthermore, this method can be selected for film production of large area with size grain controllable by controlling the doping concentration. Also, this technique leads to a large production area and it permits also the formation of thin films with possible control of oxygen vacancy by means of the use of both appropriate precursors and postannealing treatments in air [12][13][14][15].…”