A Unified View of Incommensurate-Commensurate Phase Transitions in A2BX4 Type Crystals
A Unified View of Incommensurate-Commensurate Phase Transitions in A2BX4 Type Crystals
复制标题
A2BX4 型晶体中不相称-相变相变的统一观点
DOI：
10.1143/jpsj.52.3466
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发表时间：
1983
影响因子：
1.7
通讯作者：
N. Hamaya
中科院分区：
文献类型：
--
作者：
Y. Yamada;N. Hamaya
建立了一种统一的处理方法，对a2bx4型晶体中的不相称(IC)-相称(C)相变方案进行了展望。我们已经证明，基于“扩展反铁电相互作用Ising”模型的微观处理可以解释大多数观察到的IC-C相变特征。锁相的多样性是由于在扩展的反铁电相互作用系统中存在三种不同的基态，并且每种物质在达到其中一种基态的过程中都要经过不同的瞬态锁相。在该模型中，每一种物质在二维相互作用参数空间中被表征为一个点。通过构建迄今为止观测到的材料在该相互作用参数空间中的代表点的分布图，将统一视图可视化。
A unified treatment has been constructed which gives a perspective view of incommensurate(IC)-commensurate(C) phase transition schemes in A 2 BX 4 type crystals. We have shown that a microscopic treatment based on `Extended Antiferroelectric Interaction Ising' model can explain most of the observed features of IC-C phase transitions. The wide variety of the lock-in phases is attributed to the fact that there are three different ground states in the extended antiferroelectric interaction system, and that each substance passes through various transient lock-in phases in the process of reaching one of those ground states. Within this model, each substance is characterized by a point in a two-dimensional interaction parameter space. The unified view has been visualized by constructing a distribution map of the representative points of the hitherto observed materials in this interaction parameter space.