Synthesis, structure, and physical properties of layered tetragonal Mg-doped Nd2MoO6 compoundsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 4 сентября 2019 г.
Аннотация:Undoped and Mg-doped Nd2MoO6 oxymolybdate single crystals and polycrystalline samples have been prepared by flux growth and solid-state reactions. The materials have been characterized by X-ray diffraction, EDS microanalysis, X-ray structure analysis, differential scanning calorimetry, thermogravimetry, and impedance spectroscopy. The (MgO)x(Nd2MoO6)(1–x)/2 solid solution series has been shown to extend to x = 0.20. Doping of Nd2MoO6 single crystals with Mg leads to splitting of the Mo, Nd1, and O2 sites. A structural model in which the Mg atoms partially substitute for Mo atoms and reside near the Mo site, 0.28 Å from it, ensures the best agreement with the observed diffraction pattern. The conductivity of the undoped and doped polycrystalline samples approaches 10−4 S/cm at 800 °C and is assumed to have an anionic nature.