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High- and low-temperature dual ferroelasticity in a new hybrid crystal: (Me3NCH2CH2OH)4[Ni(NCS)6]

一例具有高低温双铁弹性的新型杂化晶体: (Me3NCH2CH2OH)4[Ni(NCS)6]


本文报道了一例具有反XeF4结构的新型杂化晶体(Me3NCH2-CH2OH)4[Ni(NCS)6], 其分子组分的较复杂有序-无序转变使得该化合 物在269和360 K发生两步可逆相变. 这两步相变伴随着P21/nP4/mncBmab的空间群变化, 即分别属于正常的降温对称性破缺和反常的升温 对称性破缺现象, 因此使得该化合物可在低温和高温均展现出铁弹性 (自发极化强度分别为0.0603和0.0073). 这种不同寻常的高低温双铁弹 性的发现和研究, 有助于加深对反常对称性破缺相变的理解, 并为今后 在分子杂化晶体中探索高温铁性材料提供重要线索.


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This work was supported by the National Natural Science Foundation of China (22071273 and 21821003), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01C161).

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Corresponding author

Correspondence to Wei-Xiong Zhang.

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Author contributions

Zhang WX, Chen XM and Liu DX conceived the idea, designed the experiments and co-wrote the manuscript; Liu DX engineered the samples; Liu DX, Chen XX and Ye ZM performed the experiments; all authors contributed to the general discussion.

Conflict of interest

The authors declare that they have no conflict of interest.

De-Xuan Liu was born in 1996 and obtained his BSc degree in 2018 at Sun Yat-Sen University (SYSU). He is a PhD candidate in inorganic chemistry at SYSU. His research is focused on functional hybrid compounds.

Wei-Xiong Zhang obtained his BSc degree in 2004 and PhD degree in 2009 at SYSU, and was a JSPS (Japan Society for the Promotion of Science) postdoc at Tohoku University from 2010 to 2012. He joined SYSU in 2012, and became a professor in 2018. His current research interest is in crystal engineering of multi-component dense crystals, especially the structural-phase-transition functional crystals and energetic crystals.

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Liu, DX., Chen, XX., Ye, ZM. et al. High- and low-temperature dual ferroelasticity in a new hybrid crystal: (Me3NCH2CH2OH)4[Ni(NCS)6]. Sci. China Mater. (2021).

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