铁电性
八面体
电场
材料科学
极化(电化学)
钙钛矿(结构)
极地的
凝聚态物理
化学物理
极化密度
晶体结构
旋转(数学)
多铁性
结晶学
磁场
光电子学
磁化
电介质
化学
物理
计算机科学
物理化学
人工智能
量子力学
天文
作者
James M. Rondinelli,Craig J. Fennie
标识
DOI:10.1002/adma.201104674
摘要
Increasing demands for electric field-tunable electric, magnetic, and orbital (EMO) materials has renewed interests in ferroelectricity and its coupling to EMO properties in complex perovskite oxides. The historic design strategy to achieve a spontaneous polarization involves the incorporation of second-order Jahn-Teller (SOJT) active cations. The challenge, however, is that this mechanism is limited to specific chemistries and the polar distortions that arise are largely decoupled from EMO properties, limiting their use as field-tunable multifunctional technology materials. Here we report the crystal-chemistry criteria which circumvents those restrictions and enables the rational design of new materials displaying octahedral rotation-induced ferroelectricity - an innovative route to realize electric polarization without the need for SOJT cations - from non-polar building blocks. The strategy exploits the centric octahedral rotation patterns, which strongly couple to EMO properties, and cation ordering commonly observed in non-polar $AB$O$_3$ perovskites. By uniting switchable electric polarizations to the connectivity of the transition-metal oxygen octahedra, electric-field control over materials properties is possible.
科研通智能强力驱动
Strongly Powered by AbleSci AI