Observation of Ferrochiral Transition Induced by an Antiferroaxial Ordering of Antipolar Structural Units in Ba(TiO)Cu4(PO4)4

• DOI: 10.1021/jacs.1c00391
• Publication Date: 2021-02-25T20:20:58Z
• Authors: Takeshi Hayashida; Kenta Kimura; Daisuke Urushihara; Toru Asaka; Tsuyoshi Kimura
• Keywords: Chirality; Optical Rotation; Transition temperature

Ferrochiral transition, i.e., a transition involving an emergence of chirality, provides unique opportunity to achieve nonvolatile reversible control chirality with external fields. However, materials showing pure ferrochiral transitions, which are accompanied by no other types ferroic exceedingly rare. In this study, we propose that is achieved combination antipolar and antiferroaxial orderings structural units, substantiate proposal through study the chiral compound Ba(TiO)Cu4(PO4)4. Single crystal X-ray diffraction measurements have revealed material undergoes second order whose parameter described (staggered) rotation thus demonstrating our proposal. Furthermore, measuring spatial distributions optical rotation, successfully visualized temperature evolution domains across demonstrated relationship between rotation. This work guide find providing chirality.