X-ray photoelectron spectroscopy study of indirect exchange interaction in orthoniobate lanthanoids LnNbO4

Preparation and Dielectric Characterization of Lead‐Free Niobate Glass‐Ceramic Composites Added with Lu2O3

“…The consistent results from XRD and computer fitting suggested Lu 3+ doped into the T. T. B.‐ and C. P.‐structured phases and reached saturation as Lu 2 O 3 addition was of 2 mol%. As the radii of Ba 2+ , Na + , Lu 3+ , Nb 5+ are 1.34, 0.97, 0.85, 0.69 Å, respectively, the medium Lu 3+ is prone to occupy both the A 2 site in T. T. B. structure where Ba 2+ locates and the A site in C. P. structure where Na + locates …”

Study of Valence Band O2p–Subzone Structure of Rare Earth Tantalates and Similar Substances by X-ray Spectroscopy Method

“…On the basis of the data [1][2][3][4][5][6] and the existence common features of LaTaO 4 , LaNbO 4 , LnTaO 4 structures in whole we can predict the existence of electron distribution common features not only for isostructural LaTaO 4 and LaNbO 4 , but also for other tantalates. Their VB width will be ≈23-24 eV.…”

“…This work logically continues and develops the subject of our previous works [1][2][3][4][5][6] and is focused on the investigation of dielectrics (including ferroelectrics) with crystal structures consisted of oxygen octahedrons containing the transition metal atoms. The purpose of the work is the research of the oxygen valence p(genetically 2p)-electron energy distribution in the tantalates LnTaO 4 row (Ln La Lu), in niobate LaNbO 4 , and oxides Ta 2 O 5 , Nb 2 O 5 , La 2 O 3 by X-ray spectroscopy method.…”

“…The electronic structure of the rare earth (RE) tantalates was not investigated before. The valence band structure of LaNbO 4 (M-fergusonite-type structure modification) was studied in our work only with X-ray photoelectron method [4].…”

Growth and Characterization of Centimeter‐Sized Ba2LaFeNb4O15 Crystals from High‐Temperature Solution under a Controlled Atmosphere

“…They adopt the fergusonite structure and can display luminescent properties [76][77] and a ferroelastic transition. [78] Apart from a single-crystal structural study in 1977 by Tsunekawa et al [79] and crystal growth by the Czochralski method, [80] previously investigated LnNbO 4 crystals were prepared by flux growth methods, [81][82][83] and Octaviano [84] recently reported the use of the floating-zone method at 1300°C. Our experiments thus show that the BLFNO phase grown in LiBO 2 flux is not the only stable phase over the 850-1330°C temperature range.…”