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Low-temperature study of an Er2Ti2O7 single crystal synthesized by floating zone technique and simplified feed rod preparation route
Journal of Crystal Growth ( IF 1.8 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.jcrysgro.2020.125783
Kristina Vlášková , Petr Proschek , Jiří Pospíšil , Milan Klicpera

Abstract A new simplified synthesis of an Er 2 Ti 2 O 7 single crystal is presented. The single crystal was prepared by a floating zone technique from the unreacted stoichiometric mixture of starting oxides Er 2 O 3 and TiO 2 . No intermediate reactions of constituent oxides were conducted in contrast to previous studies. We demonstrate a good quality of prepared single crystal by both thorough (microscopic) chemical and structural characterization of the material and measurements of previously reported low-temperature properties: An Er 2 Ti 2 O 7 single crystal was characterized by means of x-ray, electron and neutron diffraction techniques, and magnetization and specific heat measurements. The low-temperature magnetization was investigated by indirect measurement employing pre-calibrated Hall probes. The obtained low-temperature data are well comparable with previous reports and document a high quality of the prepared single crystal. Presented single crystal synthesis from an unreacted precursor is prospectively applicable to other rare-earth RE 2 Ti 2 O 7 pyrochlores.

中文翻译:

浮区法合成Er2Ti2O7单晶低温研究及简化进料棒制备路线

摘要 介绍了一种新的 Er 2 Ti 2 O 7 单晶的简化合成方法。单晶由未反应的起始氧化物Er 2 O 3 和TiO 2 的化学计量混合物通过浮区技术制备。与以前的研究相比,没有进行成分氧化物的中间反应。我们通过材料的彻底(微观)化学和结构表征以及先前报道的低温特性的测量证明了制备的单晶质量良好:通过 X 射线表征 Er 2 Ti 2 O 7 单晶,电子和中子衍射技术,以及磁化和比热测量。低温磁化是通过使用预校准霍尔探头的间接测量来研究的。获得的低温数据与之前的报告具有很好的可比性,并证明所制备的单晶质量很高。由未反应的前体合成的单晶有望应用于其他稀土 RE 2 Ti 2 O 7 烧绿石。
更新日期:2020-09-01
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