Polar Ferromagnet Induced by Fluorine Positioning in Isomeric Layered Copper Halide Perovskites.

Polar Ferromagnet Induced by Fluorine Positioning in Isomeric Layered Copper Halide Perovskites.
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同质层状铜卤钙钛矿中氟位置诱导的极性铁磁体。

DOI:
10.1021/acs.inorgchem.1c03726
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发表时间:
2022-02-21
影响因子:
4.6
通讯作者:
Lightfoot, Philip
Lightfoot, Philip
中科院分区:
化学2区
文献类型:
--
作者:
Han, Ceng;McNulty, Jason A.;Bradford, Alasdair J.;Slawin, Alexandra M. Z.;Morrison, Finlay D.;Lee, Stephen L.;Lightfoot, Philip

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我们提出的位置异构的影响,通过将邻,Meta,和对位氟取代的苄胺结构的氟苄基铵铜(II)氯化物钙钛矿A2 CuCl 4的晶体结构。合成了二维极性铁磁体(3-FbaH)2CuCl 4(3-FbaH+ = 3-氟苄基铵),室温下晶体属正交晶系,空间群为Pca 21。相反,(2-FbaH)2CuCl 4(2-FbaH+ = 2-氟苄基铵)和(4-FbaH)2CuCl 4(4-FbaH+ = 4-氟苄基铵)在室温下分别以中心对称空间群P21/c和Pnma结晶,显示出晶体结构的显著差异。这些差异表明氟原子的位置是(3-FbaH)2CuCl 4中极性行为的驱动因素。初步的磁性测量证实,这三种钙钛矿在无机[CuCl 4]∞层内具有主导的铁磁相互作用。因此,(3-FbaH)2CuCl 4是一种极性铁磁体,具有I型多铁性的潜力。这项工作有望促进高性能2D卤化铜(II)钙钛矿多铁性材料的进一步发展。我们提出的位置异构的影响,通过将邻,Meta,和对位氟取代的苄胺结构的氟苄基铵铜(II)氯化物钙钛矿A2 CuCl 4的晶体结构。这三种化合物都表现出铁磁相互作用。(3-FbaH)2CuCl 4中的间位F取代导致极性结构,因此它是极性铁磁体。
We present the influence of positional isomerism on the crystal structure of fluorobenzylammonium copper(II) chloride perovskites A2CuCl4 by incorporating ortho-, meta-, and para-fluorine substitution in the benzylamine structure. Two-dimensional (2D) polar ferromagnet (3-FbaH)2CuCl4 (3-FbaH+ = 3-fluorobenzylammonium) is successfully obtained, which crystallizes in a polar orthorhombic space group Pca21 at room temperature. In contrast, both (2-FbaH)2CuCl4 (2-FbaH+ = 2-fluorobenzylammonium) and (4-FbaH)2CuCl4 (4-FbaH+ = 4-fluorobenzylammonium) crystallize in centrosymmetric space groups P21/c and Pnma at room temperature, respectively, displaying significant differences in crystal structures. These differences indicate that the position of the fluorine atom is a driver for the polar behavior in (3-FbaH)2CuCl4. Preliminary magnetic measurements confirm that these three perovskites possess dominant ferromagnetic interactions within the inorganic [CuCl4]∞ layers. Therefore, (3-FbaH)2CuCl4 is a polar ferromagnet, with potential as a type I multiferroic. This work is expected to promote further development of high-performance 2D copper(II) halide perovskite multiferroic materials. We present the influence of positional isomerism on the crystal structure of fluorobenzylammonium copper(II) chloride perovskites A2CuCl4 by incorporating ortho-, meta-, and para-fluorine substitution in the benzylamine structure. All three compounds display ferromagnetic interactions. Meta-F-substitution in (3-FbaH)2CuCl4 leads to a polar structure, and therefore it is a polar ferromagnet.
DOI: 10.1038/ncomms14282
发表时间: 2017-02-17
影响因子: 16.6
作者:
Balachandran PV;Young J;Lookman T;Rondinelli JM
通讯作者: Rondinelli JM
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DOI: 10.1038/s41467-018-05454-4
发表时间: 2018-08-01
影响因子: 16.6
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DOI: 10.1021/acs.inorgchem.1c00705
发表时间: 2021-07-09
影响因子: 4.6
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DOI: 10.1021/acs.chemmater.6b02151
发表时间: 2016-09-27
影响因子: 8.6
作者:
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通讯作者: Lotsch, Bettina V.
DOI: 10.1063/1.3253743
发表时间: 2009-11-15
影响因子: 3.2
作者:
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通讯作者: West, Anthony R.