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The synthesis and magnetic properties of BaFe2Se3 single crystals

机译：BaFe 2 Se 3 单晶的合成及磁性

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The iron selenide compound BaFe2Se3 was synthesized by a two-step high-temperature solid state method. The single-crystal X-ray determination of the prepared compound revealed a three-dimensional structure consisting of double chains of edge-sharing FeSe4 tetrahedra separated by Ba2+. In contrast to the case for alkali metal intercalated iron-based chalcogenides (like KxFe2?ySe2), the double chains of BaFe2Se3 were cut out of the two-dimension layers. X-ray photoelectron spectroscopy measurements indicated that there existed two valence states of iron: Fe2+ and Fe3+, which proved there were vacancies in the iron sites. In addition, the magnetic measurements demonstrated that BaFe2Se3 was antiferromagnetic and the Neel temperature of the sample was related to the average electronic spin of iron sites.
机译：通过两步高温固态法合成了硒化铁化合物BaFe 2 Se 3 。所制备化合物的单晶X射线测定显示三维结构，该结构由边缘共享的FeSe 4 四面体的双链分隔成Ba < sup> 2 + 。与碱金属插层的铁基硫族化物（如K x Fe 2？ y Se 2 ），BaFe 2 Se 3 。 X射线光电子能谱测量表明铁存在两个价态：Fe 2 + 和Fe 3 + ，这表明铁厂中有空缺。另外，磁性测量表明BaFe 2 Se 3 具有反铁磁性，样品的尼尔温度为与铁位点的平均电子自旋有关。

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