title: Dynamics of a caged imidazolium cation-toward understanding the order-disorder phase transition and the switchable dielectric constant.
abstract: A molecular compass-like behaviour is found in a perovskite-type cage compound (HIm)2[KCo(CN)6] (HIm = imidazolium cation). The dynamic changes in the HIm cation from the static to rotating state along with the rearrangement of the host cage result in switchable and anisotropic dielectric constants.
authors.affiliation: Department of Physics & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China. yfyao@phy.ecnu.edu.cn.
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.forename: Xiu-Dan
authors.initials: XD
authors.lastname: Shao
authors.forename: Si-Chao
authors.initials: SC
authors.lastname: Li
authors.forename: Ying
authors.initials: Y
authors.lastname: Cai
authors.forename: Ye-Feng
authors.initials: YF
authors.lastname: Yao
authors.forename: Ren-Gen
authors.initials: RG
authors.lastname: Xiong
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang