Dielectric relaxations in fine-grained SrTiO3 ceramics with Cu and Nb co-doping

The dielectric relaxation behavior induced by sodium migration in the Na2CoSiO4 structure within a three-dimensional Co–O–Si framework

“…The T À1/4 law conrmed the polaron relaxation in NCS samples. 11,39 The quasiparticle (polaron) could move between different vacant sites.…”

Corrosion resistance of NbN and NbxAlyN coatings on stainless steel

“…In Figure 2, for the Nb x Al y N coatings, it is observed a slight shift of the NbN-δ peaks to greater angles, pointing to an interplanar contraction. Comparing Al and Nb, the previous has a slightly smaller ionic radius (0.53 Å) [20] to in relation to the former (0.64 Å) [21]. The formational of a substitutional solid solution results in a contraction of the interplanar distance.…”