In this paper, domain switching induced by applied stress and thermal treatment was compared in (Na0.5Bi0.5)TiO3−xBaTiO3 (NBT-BT) solid solutions and the monolithic components by Raman spectroscopy. Despite possessing a Ti-O6 structure, the titanate materials exhibit quite different patterns of switching upon indentation generation, which might be associated with the presence of distinct stable polarizations. Significant stress induced a→c domain switching occurs around the indentation print and along the cracks for stress relaxation during crack propagation in the case of BT, while for NBT and related solution, remnant domains exist and a switching of the domains to other polarization, e.g., ⟨ 110 ⟩ may occur, showing a dependence on the BT addition content. Thermal treatments at temperatures above the Curie point were found to show different influences on domain patterns due to distinct changes in the microstructure in the presence of residual stress fields, suggesting the possibility of a combinatory effect of thermal treatment and residual stress for domain controls.

中文翻译：

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退火和应力对钛酸盐基单晶畴转换的影响

在本文中，通过拉曼光谱对 (Na0.5Bi0.5)TiO3-xBaTiO3 (NBT-BT) 固溶体和单片组件中由外加应力和热处理引起的畴转换进行了比较。尽管具有 Ti-O6 结构，钛酸盐材料在压痕产生时表现出完全不同的转换模式，这可能与不同的稳定极化的存在有关。在 BT 的情况下，在压痕印迹周围和沿着裂纹发生显着的应力引起的 a→c 域切换，以在裂纹扩展过程中进行应力松弛，而对于 NBT 和相关解决方案，存在剩余域并且域转换为其他极化，例如, ⟨ 110 ⟩ 可能出现，表现出对 BT 添加内容的依赖。