Direct observation of the stress-induced domain structure in lead-free (Na1/2Bi1/2)TiO3-based ceramics
Direct observation of the stress-induced domain structure in lead-free (Na1/2Bi1/2)TiO3-based ceramics
复制标题
DOI：
10.1063/1.5084255
复制
发表时间：
2019-02
影响因子：
4
通讯作者：
Alexander Martin;H. Uršič;T. Rojac;K. Webber
中科院分区：
文献类型：
--
作者：
Alexander Martin;H. Uršič;T. Rojac;K. Webber
在这项工作中，（Na 1/2Bi 1/2）TiO 3 -0.07BaTiO3的蠕变行为被表征为高达-500 MPa的偏置应力的函数，揭示了应力诱导的弛豫到铁电长程有序转变的时间依赖性。蠕变应变的范围内施加的压缩应力水平，特别是在约50%以上的临界矫顽应力的应力，表明显着的时间依赖性的远程铁电秩序的转变。结合非原位压电响应力显微镜测量讨论了宏观行为，该测量直接显示了机械加载弛豫铁电体中铁电畴的形成。（Na 1/2Bi 1/2）TiO 3 -0.07BaTiO3被表征为高达-500 MPa的偏置应力的函数，揭示了应力诱导弛豫到铁电长程有序转变的时间依赖性。蠕变应变的范围内施加的压缩应力水平，特别是在约50%以上的临界矫顽应力的应力，表明显着的时间依赖性的远程铁电秩序的转变。的宏观行为进行了讨论，结合非原位piezoresponse力显微镜测量，直接显示在机械加载的弛豫铁电体的铁电畴的形成。
In this work, the creep behavior of (Na1/2Bi1/2)TiO3-0.07BaTiO3 was characterized as a function of bias stress up to −500 MPa, revealing the time-dependence of the stress-induced relaxor-to-ferroelectric long-range order transformation. Creep strain was observed across a range of applied compressive stress levels, in particular at stresses approximately 50% above the critical coercive stress, indicating the significant time-dependence of the transformation on the long-range ferroelectric order. The macroscopic behavior is discussed in conjunction with ex situ piezoresponse force microscopy measurements that directly show the formation of ferroelectric domains in mechanically loaded relaxor ferroelectrics.In this work, the creep behavior of (Na1/2Bi1/2)TiO3-0.07BaTiO3 was characterized as a function of bias stress up to −500 MPa, revealing the time-dependence of the stress-induced relaxor-to-ferroelectric long-range order transformation. Creep strain was observed across a range of applied compressive stress levels, in particular at stresses approximately 50% above the critical coercive stress, indicating the significant time-dependence of the transformation on the long-range ferroelectric order. The macroscopic behavior is discussed in conjunction with ex situ piezoresponse force microscopy measurements that directly show the formation of ferroelectric domains in mechanically loaded relaxor ferroelectrics.