Ferroaxial Transitions in Glaserite-type Compounds: Database Screening, Phonon Calculations, and Experimental Verification

Ferroaxial Transitions in Glaserite-type Compounds: Database Screening, Phonon Calculations, and Experimental Verification
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方晶石型化合物中的铁轴转变:数据库筛选、声子计算和实验验证

DOI:
10.1021/acs.chemmater.2c03540
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发表时间:
2023
影响因子:
8.6
通讯作者:
Kimura Tsuyoshi
Kimura Tsuyoshi
中科院分区:
材料科学2区
文献类型:
--
作者:
Yamagishi Shigetada;Hayashida Takeshi;Misawa Ryusuke;Kimura Kenta;Hagihala Masato;Murata Tomoki;Hirose Sakyo;Kimura Tsuyoshi

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所谓的铁轴转变,其特征在于打破镜像对称的旋转结构畸变,作为晶体材料中一类新的铁性态,引起了人们越来越多的兴趣。RbFe(MoO 4)2属于钾霞石型化合物X(□;1)Y(□;2)[M(TO 4)2],是表现出铁轴转变的最具代表性的材料之一,即,铁轴材料考虑到各种各样的玻璃石型化合物,我们期望它们为铁轴材料提供一个很好的竞技场。在这项工作中,我们探索了新的铁轴材料的公式为基础的筛选使用正则表达式搜索和对称性检测算法。因此,我们发现钾霞石型化合物K_2Zr(PO_4)_2是一种很有前途的铁轴材料。在实验上,我们证明了K_2Zr(PO_4)_2在700 K左右发生了铁轴相变,这一现象用从头算声子计算得到了很好的解释. K2 Zr(PO 4)2的铁轴性质通过使用线性电回转效应观察其畴结构进一步证实,即,旋光度与外加电场成比例。我们的工作为探索铁轴材料提供了一条有效的途径。
The so-called ferroaxial transition characterized by a rotational structural distortion that breaks a mirror symmetry has gained growing interest in terms of a new class of ferroic state in crystalline materials. RbFe(MoO4)2, which belongs to glaserite-type compounds,X(□;1)Y(□;2)[M(TO4)2], is one of the most representative materials showing a ferroaxial transition, i.e., ferroaxial materials. Considering a variety of glaserite-type compounds, we expect that they provide a good arena for ferroaxial materials. In this work, we explored new ferroaxial materials by formula-based screening using a regular expression search and the symmetry detection algorithm. As a result, we found that a glaserite-type compound, K2Zr(PO4)2, is one of the promising candidates for ferroaxial materials. Experimentally, we demonstrate that K2Zr(PO4)2shows a ferroaxial transition at about 700 K, which is well explained byab initiophonon calculations. The ferroaxial nature of K2Zr(PO4)2is further confirmed by the observation of its domain structures using a linear electrogyration effect, i.e., optical rotation in proportion to an applied electric field. Our work provides an effective approach to exploring ferroaxial materials.
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