Polarization- and Strain-Mediated Control of Negative Thermal Expansion and Ferroelasticity in BiInO3-BiZn1/2Ti1/2O3
Polarization- and Strain-Mediated Control of Negative Thermal Expansion and Ferroelasticity in BiInO3-BiZn1/2Ti1/2O3
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BiInO3-BiZn1/2Ti1/2O3 中负热膨胀和铁弹性的极化和应变介导控制
DOI：
10.1021/acs.chemmater.0c04049
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发表时间：
2021
影响因子：
8.6
通讯作者：
Azuma Masaki
中科院分区：
文献类型：
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作者：
Nishikubo Takumi;Ogata Takahiro;Venkataraman Lalitha Kodumudi;Isaia Daniel;Pan Zhao;Sakai Yuki;Hu Lei;Kawaguchi Shogo;Machida Akihiko;Watanuki Tetsu;Yu Hongwu;Okimoto Yoichi;Koshihara Shin-ya;Mori Shigeo;Rudel Jorgen;Azuma Masaki
研究了极性钙钛矿氧化物BiInO 3和BiZn 1/2 Ti 1/2 O3之间的固溶体，其中Bi 3+和B位（In和Zn 1/2 Ti 1/2）的原子位移是自发极化的起源。当x ≤ 0.3时，BiIn 1-xZnx/2 Tix/2 O3中观察到极性正交到非极性正交的转变，并伴有体积收缩恒定的负热膨胀（NTE）。从A-位Bi 3+到B-位离子的电极化的相对移位降低了转变温度，并使NTE在宽的温度范围内具有抑制的温度滞后。此外，在0.4 ≤x≤ 0.8时，发现了具有铁弹和压电行为的新的LiNbO 3型相，具有非常高的开关应变，并证明了增强畴壁迁移率的潜力。
A solid solution between polar perovskite oxides BiInO3and BiZn1/2Ti1/2O3with the atomic displacement of Bi3+and B-site (In and Zn1/2Ti1/2) as the origin of spontaneous electric polarization was investigated. Polar orthorhombic to nonpolar orthorhombic transition accompanied by negative thermal expansion (NTE) with constant volume shrinkage was observed forx≤ 0.3 in BiIn1–xZnx/2Tix/2O3. A relative shift of electrical polarization from A-site Bi3+to B-site ions reduced the transition temperature and enabled NTE in a wide temperature range with suppressed temperature hysteresis. In addition, new LiNbO3-type phases were found for 0.4 ≤x≤ 0.8 with ferroelastic and piezoelectric behaviors, featuring a very high switching strain and demonstrating the potential for enhanced domain wall mobility.