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
中科院分区:
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
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.
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影响因子:
16.6
作者:
Balachandran PV;Young J;Lookman T;Rondinelli JM
通讯作者:
Rondinelli JM
影响因子:
16.6
作者:
Lee JW;Dai Z;Han TH;Choi C;Chang SY;Lee SJ;De Marco N;Zhao H;Sun P;Huang Y;Yang Y
通讯作者:
Yang Y
影响因子:
4.6
作者:
Han, Ceng;Bradford, Alasdair J.;Lightfoot, Philip
通讯作者:
Lightfoot, Philip
影响因子:
8.6
作者:
Lermer, Claudia;Birkhold, Susanne T.;Lotsch, Bettina V.
通讯作者:
Lotsch, Bettina V.
影响因子:
3.2
作者:
Li, Ming;Shen, Zhijian;West, Anthony R.
通讯作者:
West, Anthony R.