Spiral formation during Czochralski growth of rare-earth scandates

被引：97
|
作者：
Uecker, R.
Wilke, H.
Schlom, D. G.
Velickov, B.
Reiche, P.
Polity, A.
Bernhagen, M.
Rossberg, M.
机构：
[1] Inst Crystal Growth, D-12489 Berlin, Germany
[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[3] Univ Giessen, Inst Phys, D-35392 Giessen, Germany
来源：
JOURNAL OF CRYSTAL GROWTH | 2006年 / 295卷 / 01期
关键词：
convective instability; heat transfer; Czochralski method; oxides;
D O I：
10.1016/j.jcrysgro.2006.07.018
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Single crystals of the rare-earth scandates DyScO3, GdSCO3, SmScO3, and NdScO3 were grown by the Czochralski technique. The influence of the absorption of radiant heat in the growing crystals on interface stability was investigated. Numerical simulations were performed to calculate the influence of thermal instabilities close to the growth interface on the axial symmetry of the flow field, which eventually leads to spiral growth. To inhibit spiral formation, a conical baffle was utilized to intensifying the buoyant-thermocapillary convection. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：84 / 91
页数：8
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