Ferromagnetic and plastically deformable organic–inorganic hybrid crystal: (C7H9NH3)2CuCl4

Sotaro Kusumoto; Sakura Nagasawa; Ryo Suzuki; Masaru Tachibana; Yuta Tsuji; Hikaru Zenno; Yuto Nakashima; Shinya Hayami; Yang Kim; Yoshihiro Koide

doi:10.1039/D5CC02170G

Ferromagnetic and plastically deformable organic–inorganic hybrid crystal: (C₇H₉NH₃)₂CuCl₄†

Sotaro Kusumoto,

*^a Sakura Nagasawa,^a Ryo Suzuki,

^b Masaru Tachibana,

^b Yuta Tsuji,

^c Hikaru Zenno,^d Yuto Nakashima,^d Shinya Hayami,

^de Yang Kim^d and Yoshihiro Koide*^a

Author affiliations

* Corresponding authors

^a Department of Applied Chemistry, Faculty of Chemistry and Biochemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
E-mail: kusumoto@kanagawa-u.ac.jp

^b Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan

^c Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

^d Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan

^e Priority Organization for Innovation and Excellence, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan

Abstract

We report a plastically deformable organic–inorganic hybrid crystal, (C₇H₉NH₃)₂CuCl₄, exhibiting ferromagnetism below 8 K. Its 2D layered structure enables stress-induced plastic bending via van der Waals slip between alkyl chains. Nanoindentation reveals exceptional mechanical compliance, and magnetic studies confirm long-range ordering. This represents the first known example of a ferromagnetic crystal with plastic deformability.

Chemical Communications

Ferromagnetic and plastically deformable organic–inorganic hybrid crystal: (C₇H₉NH₃)₂CuCl₄†

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Ferromagnetic and plastically deformable organic–inorganic hybrid crystal: (C₇H₉NH₃)₂CuCl₄

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