Ruddlesden-Popper结构杂化非常规铁电体的研究进展

doi:10.15541/jim20240521

摘要/Abstract

摘要： 杂化非常规铁电性(Hybrid Improper Ferroelectricity, HIF)指的是在含钙钛矿结构单元的化合物中,通过阴离子八面体面内旋转和面外倾侧耦合而产生的二阶铁电序。HIF有望在强磁电耦合多铁性材料中获得重要应用,并极大地拓展铁电体物理学的内涵和外延。本文总结了Ruddlesden-Popper(R-P)结构杂化非常规铁电体的实验研究进展,建立了双层R-P结构铁电体的居里温度和许容因子之间的线性关系,并阐述其HIF物理起源。基于杂化非常规铁电体的内禀电控磁性,在双层R-P铁氧体中观察到室温极性相和弱铁磁相共存,具有重要的科学意义。此外,在A位离子有序三层R-P氧化物中报道的铁电性显著拓宽了HIF的研究广度和深度。尽管R-P结构的杂化非常规铁电体的研究已取得显著进展,但在新材料体系和单相多铁性材料探索上仍需进一步努力。

关键词: 杂化非常规铁电性, Ruddlesden-Popper结构, 单相多铁性, 综述

Abstract: Hybrid improper ferroelectricity(HIF) is recognized as a secondary ferroelectric phenomenon induced by the coupling of in-plane rotation and out-of-plane tilt of anion octahedral in compounds with the units of perovskite structure. HIF is expected to be applicable in the multiferroic materials with strong magnetoelectric coupling owing to its intrinsic characteristic for the electric-field control of magnetism, thereby greatly extending the connotation and denotation of ferroelectric physics. This paper focuses on the experimental progress of HIF materials with Ruddlesden-Popper (R-P) structure. It also establishes the linear relationship between Curie temperature and tolerance factor of double-layered R-P oxides, elucidating the underlying physical mechanisms of HIF. Based on the intrinsic electric-field control of magnetism for HIFs, the detection of the coexistence of polar and weak ferromagnetic phases in ferrites with double-layered R-P structures are of great scientific significance. Additionally, the documented ferroelectricity in the A-site cation-ordered triple-layered R-P oxide has significantly expanded the fields of HIFs. Although significant progress has been achieved for understanding HIFs in R-P oxides, more efforts should be made to explore more new material systems and to achieve the single-phase multiferroic in HIFs.

Key words: hybrid improper ferroelectricity, Ruddlesden-Popper structure, single-phase multiferroicity, review

张碧辉, 刘小强, 陈湘明. Ruddlesden-Popper结构杂化非常规铁电体的研究进展[J]. 无机材料学报, DOI: 10.15541/jim20240521.

ZHANG Bihui, LIU Xiaoqiang, CHEN Xiangming. Recent Progress of Hybrid Improper Ferroelectricity with Ruddlesden-Popper Structure[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20240521.

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