High- and low-temperature dual ferroelasticity in a new hybrid crystal: (Me3NCH2CH2OH)4[Ni(NCS)6]
نویسندگان
چکیده
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/n–P4/mnc–Bmab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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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2021
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1794-1