Twin structures in tetragonal SrTiO3:: The ferroelastic phase transition and the formation of needle domains

被引:33
作者
Buckley, A
Rivera, JP
Salje, EKH
机构
[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England
[2] Univ Geneva, Dept Inorgan Analyt & Appl Chem, CH-1211 Geneva 4, Switzerland
关键词
D O I
10.1063/1.370942
中图分类号
O59 [应用物理学];
学科分类号
摘要
Direct optical observation of the twin domains in ferroelastic strontium titanite at 8 K < T < 105 K show that twin boundaries in the bulk do not change at temperatures below 103.4 K. At temperatures between 103.4 K and T-c = 105.65 K the contrast between the birefringences of two adjacent domains is too weak to allow the visual observation of the domain wall. The temperature independent, coarse domain structure in the bulk of the crystal is in strong contrast with a fine domain structure and strain relaxations near the crystal surface. No indication for wall flip motion was found for repeated, slow cooling, and heating through the transition point. (C) 1999 American Institute of Physics. [S0021-8979(99)01915-5].
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页码:1653 / 1656
页数:4
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