Crystal structure, electrical properties, and mechanical response of (100)-/(001)-oriented epitaxial Pb(Mg1∕3Nb2∕3)O3–PbTiO3 films grown on (100)cSrRuO3‖(100)SrTiO3 substrates by metal-organic chemical vapor deposition
Crystal structure, electrical properties, and mechanical response of (100)-/(001)-oriented epitaxial Pb(Mg1∕3Nb2∕3)O3–PbTiO3 films grown on (100)cSrRuO3‖(100)SrTiO3 substrates by metal-organic chemical vapor deposition
复制标题
DOI：
10.1063/1.2337391
复制
发表时间：
2006-09
影响因子：
3.2
通讯作者：
S. Yokoyama;S. Okamoto;H. Funakubo;T. Iijima;K. Saito;H. Okino;Takashi Yamamoto;K. Nishida
中科院分区：
文献类型：
--
作者：
S. Yokoyama;S. Okamoto;H. Funakubo;T. Iijima;K. Saito;H. Okino;Takashi Yamamoto;K. Nishida
采用金属有机化学气相沉积法在（100）cSrRuO 3/（100）SrTiO 3衬底上生长了厚度为2-3μm、PbTiO 3含量（x）为0 ~ 1的弛豫型铁电（1−x）Pb（Mg 1 scin 3 Nb 2 scin 3）O3-xPbTiO 3（PMN-PT）薄膜。系统地研究了x值对薄膜的晶体结构、介电和铁电性能以及机械响应的影响。从X射线衍射倒易空间映射分析和拉曼光谱确定了具有（100）scinc（001）取向的外延生长与x无关以及随x的组分相变。随着x的增加，组成相由菱面体（假立方）单相、菱面体（假立方）相和四方体相的混合相、四方体单相转变。发现在x=0.40-0.55处存在混合相区，这与单晶的报道（x=0.31-0.35）不同。研究了相对介电常数与反射极化率的关系。
Relaxor-type ferroelectric (1−x)Pb(Mg1∕3Nb2∕3)O3–xPbTiO3 (PMN-PT) films, 2–3μm in thickness, with a PbTiO3 content (x) ranging from 0 to 1 were grown on (100)cSrRuO3‖(100)SrTiO3 substrates at 650°C by metal-organic chemical vapor deposition. The effects the x value had on the crystal structure, dielectric and ferroelectric properties, and mechanical response of these films were systematically investigated. Epitaxial growth having (100)∕(001) orientation irrespective of x and the constituent phase change with x were ascertained from both x-ray diffraction reciprocal space mapping analysis and Raman spectroscopy. The constituent phase changed from a rhombohedral (pseudocubic) single phase, a mixture phase of rhombohedral (pseudocubic) and tetragonal phases, and a tetragonal single phase, with increasing x. The mixed phase region was found to exist at x=0.40–0.55, which was different from that reported for single crystals (x=0.31–0.35). The dependencies of relative dielectric constant and remanent polarizati...