Formation of micro-crystals on the (100) surface of SrTiO3 at elevated temperatures
Formation of micro-crystals on the (100) surface of SrTiO3 at elevated temperatures
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DOI：
10.1016/s0039-6028(00)00522-7
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发表时间：
2000-07-20
期刊：
影响因子：
1.9
通讯作者：
Waser, R
中科院分区：
文献类型：
--
作者：
Szot, K;Speier, W;Waser, R
作为在环境压力下约1000 - 1100摄氏度热处理的结果，液滴状特征和规则形状的微晶出现在化学计量和掺杂的SrTiO 3的单晶的（100）表面上。采用二次离子质谱、原子力显微镜和X射线光电子能谱对改性后的表面形貌进行了表征。结果提供了证据的积累SrOx的表面上的液体形式和随后的再结晶为SrO上延长退火。的现象进行了讨论，在近表面区域的重组和材料的损失，在所采用的温度下，从热重测量明显。(C)2000 Elsevier Science B.V.保留所有权利。
Droplet-like features and regularly shaped micro-crystals appear on the (100) surface of single-crystals of stoichiometric and doped SrTiO3 as a result of heat treatment around 1000-1100 degrees C under ambient pressure. Secondary ion mass spectrometry, atomic force microscopy and X-ray photoemission are employed to characterize the morphology of the modified surface. The results provide evidence of an accumulation of SrOx on the surface in a liquid form and subsequent recrystallization as SrO on prolonged annealing. The phenomena are discussed in relation to the restructuring in the near-surface region and the loss of material at the temperatures employed, as evident from thermogravimetrical measurements. (C) 2000 Elsevier Science B.V. All rights reserved.