Systematic Investigation of Ferroelectric Properties in x%YO1.5-(100-x%)Hf1-yZryO2 Films
Systematic Investigation of Ferroelectric Properties in x%YO1.5-(100-x%)Hf1-yZryO2 Films
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系统%20调查%20of%20铁电%20性质%20in%20x%YO1.5-(100-x%)Hf1-yZryO2%20薄膜
DOI：
10.1021/acsaelm.2c01658
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发表时间：
2023
影响因子：
4.7
通讯作者：
Funakubo Hiroshi
中科院分区：
文献类型：
--
作者：
Mimura Takanori;Tashiro Yuki;Shimizu Takao;Funakubo Hiroshi
采用外延%YO1.5 - (100-x %) hf1 - yzryo2薄膜研究了成分对铁电性能的影响。四方相在与正交相或单斜相的相边界附近，通过场致相变从四方相到正交相表现出铁电性。值得注意的是，通过场诱导相变产生的正交相具有较低的矫顽力场（Ec）。在1400 (5% yo1.5 ~ 95%(Hf0.50Zr0.50)O2) ~ 2400 kV/cm （5% yo1.5 ~ 95%(Hf0.75Zr0.25)O2）范围内，残余极化（Pr）值为~ 17 μC/cm2。这些结果对于具有低压驱动的铁电器件应用具有重要意义。
The effect of composition on the ferroelectric properties was investigated using epitaxialx%YO1.5–(100–x%)Hf1–yZryO2films. The tetragonal phase, with a composition near the phase boundaries with the orthorhombic or monoclinic phase, exhibits ferroelectricity through the field-induced phase transition from the tetragonal to the orthorhombic phase. Remarkably, the orthorhombic phase generated via the field-induced phase transition has a lower coercive field (Ec). TheEccould be controlled from 1400 (5%YO1.5–95%(Hf0.50Zr0.50)O2) to 2400 kV/cm (5%YO1.5–95%(Hf0.75Zr0.25)O2) with the same remnant polarization (Pr) value of ∼17 μC/cm2. These results are important for ferroelectric device applications with low-voltage drives.