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Elucidation of dipolar dynamics and the nature of structural phases in the [(CH3)2NH2][Zn(HCOO)3] hybrid perovskite framework

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Abstract

The indications of peculiar multiferroic behavior of dimethylammonium metal-formate perovskite frameworks raised important questions about the origin of the structural phase transition, structural phases and dipolar dynamics in these compounds. Here we provide answers on some of these phenomena by presenting a comprehensive experimental and theoretical study of the [(CH3)2NH2][Zn(HCOO)3] framework. Broadband dielectric spectroscopy assisted by molecular dynamics simulations allows us to probe the dipolar relaxation dynamics in both structural phases on an extensive time scale. The results of dielectric spectroscopy are complemented by non-linear dielectric susceptibility, electric field dependent and ultrasonic experiments. Contrary to a prevailing notion, we clearly demonstrate that the [(CH3)2NH2][Zn(HCOO)3] perovskite is not a relaxor material and raise serious doubts about its proper ferroelectric nature.

Graphical abstract: Elucidation of dipolar dynamics and the nature of structural phases in the [(CH3)2NH2][Zn(HCOO)3] hybrid perovskite framework

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Publication details

The article was received on 06 Mar 2019, accepted on 07 May 2019 and first published on 07 May 2019


Article type: Paper
DOI: 10.1039/C9TC01275C
J. Mater. Chem. C, 2019, Advance Article

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    Elucidation of dipolar dynamics and the nature of structural phases in the [(CH3)2NH2][Zn(HCOO)3] hybrid perovskite framework

    M. Šimėnas, S. Balčiūnas, A. Ciupa, L. Vilčiauskas, D. Jablonskas, M. Kinka, A. Sieradzki, V. Samulionis, M. M<img border="0" src="https://www.rsc.org/images/entities/char_0061_0327.gif" alt="[a with combining cedilla]" xmlns="http://www.rsc.org/schema/rscart38" />czka and J. Banys, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC01275C

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