Abstract The growth conditions and the resultant grain morphologies and phase purities from floating-zone growth of 67%BiFeO 3 -33%BaTiO 3 (BF-33BT) single crystals are reported. We find two formidable challenges for the growth. First, a low-melting point constituent leads to a pre-melt zone in the feed-rod that adversely affects growth stability. Second, constitutional super-cooling (CSC), which was found to lead to dendritic and columnar features in the grain morphology, necessitates slow traveling rates during growth. Both challenges were addressed by modifications to the floating-zone furnace that steepened the temperature gradient at the melt-solid interfaces. Slow growth was also required to counter the effects of CSC. Single crystals with typical dimensions of hundreds of microns have been obtained which possess high quality and are suitable for detailed structural studies.

中文翻译：

---

67%BiFeO 3 -33%BaTiO 3 溶液的浮区法单晶生长

摘要 报道了 67%BiFeO 3 -33% BaTiO 3 (BF-33BT) 单晶浮区生长的生长条件和所得晶粒形态和相纯度。我们发现增长面临两个艰巨的挑战。首先，低熔点成分会导致进料棒中的预熔区对生长稳定性产生不利影响。其次，结构过冷 (CSC) 被发现会导致晶粒形态中的树枝状和柱状特征，因此在生长过程中需要缓慢的移动速度。这两个挑战都通过对浮区炉的修改来解决，该炉使熔体-固体界面处的温度梯度变陡。还需要缓慢增长以抵消 CSC 的影响。