GROWTH, TWINNING AND ETCH FIGURES OF FERROELECTRIC FERROELASTIC DENDRITIC BIFEO3 SINGLE DOMAIN CRYSTALS

被引:70
作者
KUBEL, F
SCHMID, H
机构
[1] Départment de Chimie Minérale, Analytique et Appliquée, Université de Genève
关键词
D O I
10.1016/0022-0248(93)90485-F
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Ferroelectric/ferroelastic dendritic single domain crystals of BiFeO3 were grown in the ferroelectric phase in a Bi2O3/B2O3/Fe2O3 flux using a platinum crucible, placed in an evacuated sealed quartz tube. Etching of the crystals shows the non-centrosymmetric polar character of the crystals. The single domains can be rendered ferroelastically polydomain by heating above the phase transition temperature of 1110 K and subsequent cooling or by mechanical twinning using stress components along the spontaneous polarization direction, which represents the longest pseudocubic space diagonal. Mechanical detwinning has also been observed. Etching of the twinned crystals at room temperature showed no 180-degrees ferroelectric domains inside the ferroelastic domains.
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页码:515 / 524
页数:10
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