Ferroelectricity and phase transition of halide solid-solution dabcoH(BrxI1−x)

Yuki Ohishi; Junya Fujiwara; Atsuko Masuya-Suzuki; Yoko Tatewaki; Sadafumi Nishihara; Shun Dekura; Tomoyuki Akutagawa; Ryo Tsunashima

doi:10.1039/D5DT00583C

Ferroelectricity and phase transition of halide solid-solution dabcoH(Br_xI_1−x)†

Yuki Ohishi,^a Junya Fujiwara,^a Atsuko Masuya-Suzuki,

^abc Yoko Tatewaki,^d Sadafumi Nishihara,

^e Shun Dekura,

^c Tomoyuki Akutagawa

^c and Ryo Tsunashima

*^ab

Author affiliations

* Corresponding authors

^a Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
E-mail: ryotsuna@yamaguchi-u.ac.jp

^b Department of Chemistry, Faculty of Science, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan

^c Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology 2-24-16, Nakacho, Koganei 184-8588, Japan

^d Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashi-hiroshima 739-8526, Japan

^e Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan

Abstract

The temperature and composition dependence of the ferroelectric and structural phase transition behaviours of hydrogen-bonding molecular relaxor dabcoHX (X = Br, I) were investigated using a halide solid-solution, dabcoH(Br_xI_1−x). A typical relaxor ferroelectric type polarisation-electric field relationship was observed with increases in temperature and Br-content. In addition, the phase transition temperature depends on the composition, and the structure of I-rich solid-solutions changed reversibly back to a hydrogen-bonded hexagonal phase after heating. These results demonstrated the tuning of relaxor ferroelectrics by tuning the ratio of Br and I ions in the one-dimensional dabco-based hydrogen bonding system.

This article is part of the themed collection: Spotlight Collection: Mixed-Anion Compounds

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Article information

DOI: https://doi.org/10.1039/D5DT00583C
Article type: Paper
Submitted: 11 Mar 2025
Accepted: 09 May 2025
First published: 29 May 2025

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Dalton Trans., 2025, Advance Article

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Ferroelectricity and phase transition of halide solid-solution dabcoH(Br_xI_1−x)

Y. Ohishi, J. Fujiwara, A. Masuya-Suzuki, Y. Tatewaki, S. Nishihara, S. Dekura, T. Akutagawa and R. Tsunashima, Dalton Trans., 2025, Advance Article , DOI: 10.1039/D5DT00583C

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