Structural, vibrational and electrical properties of ordered double perovskite oxide BaLaMnSbO6

Dielectric investigation of the Sr3WO6 double perovskite at RF/microwave frequencies

“…The activation energy (E a ) for this thermo-activated process was calculated by shiing frequency of maximum frequency and the values for this thermo-active process were about 1.3 eV. Some double perovskites present smaller values than SWO, as La 2 Co 1+x (Mg y Ti 1Ày ) 1Àx O 6 (E a ¼ 0.77-0.81 eV), 24 BaPrCoTaO 6 (E a ¼ 0.35-0.38 eV), 25 BaLaMnSbO 6 (E a ¼ 0.49-0.51 eV), 26 Sr 2 CeTaO 6 (E a ¼ 0.78 eV), 27 BaPrCoNbO 6 (E a ¼ 0.4 eV) 28 and Sr 2 MgMoO 6Àd (E a ¼ 0.52 and 1.43 eV). 29 Therefore, the thermo-active process requires more energy for SWO.…”

The Effect of Replacement of Zn <sup>2+</sup> Cation with Ni <sup>2+</sup> Cation on the Structural Properties of Ba sub>2</sub>Zn sub>1–x </sub>Ni sub>x</sub>WO sub>6</sub> Double Perovskite Oxides (X = 0, 0.25, 0.50, 0.75, 1)

“…The bands appeared around 420 cm −1 are may be due to deformational modes of theZnO 6 , NiO 6 and WO 6 octahedrals. From Figure 5 that shows the transmittance of Ba 2 Zn 1-x Ni x WO 6 double perovskite series versus wave number; all the samples confirmed the molecular bands on the form perovskite oxide [24]. The peak between 1450 -1400 cm −1 is likely corresponds to overtones of the fundamental vibrations of carbonate [25] [26].…”

“…Another interesting point appear by this spectra is the presence of the high intensity band at about 825 cm −1 which can be assigned to the symmetric stretching vibration of these octahedral as explain. The positions of these bands suggests relatively long (Zn-O 6 ), (Ni-O 6 ) and (W-O 6 ) bands [23] [24]. The bands appeared around 420 cm −1 are may be due to deformational modes of theZnO 6 , NiO 6 and WO 6 octahedrals.…”

Cationic ordering and Dielectric Relaxation in a New Series of Double Perovskite BaNdCoXO6 (X = Nb, Sb and Ta)

“…This special class of magnetic materials, especially ferrite, perovskite and double perovskite, has shown many unusual physicochemical properties and wide range of technological applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Each one of the above mentioned magnetic oxides, i.e., ferrite, perovskite and double perovskite, has their own domain of interests.…”

“…Hence, double perovskites (DPs) are more attractive for developing spintronic devices at room temperature applications, despite the fact that magnetic perovskites exhibited a rich phase diagram of structural, magnetic and electrical properties [1][2][3][4][5][6][7][8][9][10][11]. It is to be noted that some rare earth based DPs having general formula A′A″B′B″O6 (A′, A″ -rare earth or alkaline earth ions and B′, B″ -transition metal ions or metalloids) have recently received great attention owing to their interesting physico-chemical properties [12][13][14].…”