On Characterization of Barium Rare-Earth Antimonates: Ordered Perovskites Suitable as Substrates for Superconducting Films

Re-examination of the structure of Ba2MIrO6 (M=La, Y): space group revised

“…We point also that several known ordered perovskites that have the cubic space group Fm3m, e.g. Ba 2 TlSbO 6 (t = 0.993) [12], Ba 2 YSbO 6 (t = 0.99), and Ba 2 HoSbO 6 (t = 0.99) [9], all show small deviation of tolerance factor from unity. As was mentioned above, the space group P2 1 /n that was used by Wakeshima et al to describe the structure of the title compounds is not consistent with the observed X-ray diffraction patterns.…”

“…In addition, the refined atomic positions of oxygen atoms reported thus far for Ba 2 Sc) [6] all show very large standard deviations, indicative of wrong assignment of the space group. Doubt on the monoclinic structure of Ba 2 MIrO 6 is also cast by the ordered perovskites Ba 2 BiSbO 6 [8] and Ba 2 MSbO 6 (M = Y, Ho) [9], which have the space groups R3 and Fm3m, respectively.…”

FT-Raman and FT-IR vibrational spectroscopic studies of nanocrystalline Ba2RESbO6 (RE=Sm, Gd, Dy and Y) perovskites

“…In order to fully realize the potential applications of Ba 2 RESbO 6 compounds, it is essential to establish their precise structures. Alonso et al [5], Fu and IJdo [6] and Karunadasa et al [7] studied the crystal structure of Ba 2 RESbO 6 (RE = Sm, Gd, Dy and Y) materials using X-ray and neutron diffraction patterns by Rietveld analysis and reported that they have double cubic perovskite structure. Jose et al have reported that Ba 2 LaSbO 6 has monoclinic structure [8].…”

Synthesis, characterization, sintering and dielectric properties of nanostructured perovskite-type oxide, Ba2GdSbO6

“…Ba 2 LnSbO 6 (Ln = lanthanides) compounds with double perovskite A 2 BB′O 6 structure have been extensively studied in the past (Blasse 1965;Garcia Cascado et al 1984;Alonso et al 1997;Karunadasa et al 2003). Among these materials, Ba 2 GdSbO 6 compound was of special interest because of its applications (Kurian et al 1995) as substrate for high temperature superconducting YBa 2 Cu 3 O 7-δ films.…”