Sol–gel synthesis and properties of YBa2(Cu1−xMx)4Oy (M=Co, Ni) and effects of additional replacement of yttrium by calcium

Influence of Sr substitution on the structure, charge distribution, and critical temperature ofY(Ba1−xSrxKarpiński1, Казаков2, Angst3 et al. 2001Phys. Rev. B302210View full textAdd to dashboardCite

“…Y124 is one of the few compounds where Sr substitution increases T c , although structural changes are similar to those in Y123. Investigations of the substitution of Sr for Ba in Y124 and Y247 have been performed in the past on polycrystalline samples, [17][18][19] which made investigation of intrinsic physical parameters difficult. In our work structural investigations are performed on single crystals, which are later used for investigation of superconducting parameters ␥, , , and H irr , 20 while NQR was performed on polycrystalline samples because of the required larger mass of the sample.…”

Phase formation of ferroelectric perovskite 0.75 Pb(Zn1/3,Nb2/3)O3–0.25 BaTiO3 prepared by aqueous solution–gel chemistry

“…1,2 By realizing a chemically homogeneous and amorphous gel out of a solution, containing all metal ions bound to tailor-made organic ligands, one is able to form the desired ceramic powder through thermal decomposition of the organic matrix in the gel and subsequent oxide crystallization. [3][4][5] By spincoating the solution on a proper substrate, followed by subsequent gelation and thermal treatment, one is able to make thin oxide films. 6 These thin ferroelectric films can be used in electronics as non-volatile ferroelectric random access memories (NV-FeRAM) 7 and multilayer ceramic capacitors (MLCC).…”