立方晶系晶体本征铁弹相变序参量的选取

发布时间：2018-05-08 19:35

本文选题：本征铁弹相变 + 立方晶系　；参考：《人工晶体学报》2016年03期

【摘要】：在本征铁弹相变的软模理论的基础上,依据弹性本构关系和居里原理,给出了立方晶系晶体所有可能的自发应变的种类,研究了立方晶系晶体本征铁弹相变序参量的选取问题。以Th群和Oh群为例,阐明了不同类的序参量导致晶体对称性变化相同的的原因,提出了该情况下序参量选取的"就少不就多"的原则。得到了发生本征铁弹相变时所有可能的序参量及晶体的对称性的变化。
[Abstract]:On the basis of the soft mode theory of intrinsic ferroelastic phase transition, according to the elastic constitutive relation and Curie principle, all possible spontaneous strain types of cubic system crystal are given, and the selection of intrinsic ferroelastic transformation order parameters of cubic system crystal is studied. Taking Th group and Oh group as examples, this paper illustrates the reason why different order parameters lead to the same crystal symmetry change, and puts forward the principle of "less order parameter is more than more" in this case. All the possible order parameters and the symmetry of the crystal are obtained when the intrinsic ferroelastic phase transition occurs.
【作者单位】：河北工业大学理学院;
【基金】：国家自然科学基金(11204063;61204013)
【分类号】：O73

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