Bis(imidazolium) L-Tartrate: A Hydrogen-Bonded Displacive-Type Molecular Ferroelectric Material

Authors

  • Dr. Zhihua Sun,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (P.R. China)
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  • Tianliang Chen,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (P.R. China)
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  • Prof. Junhua Luo,

    Corresponding author
    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (P.R. China)
    • Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (P.R. China)
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  • Prof. Maochun Hong

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (P.R. China)
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  • This work was financially supported by the NSFC (grants 51102231 and 21171166), the One Hundred Talent Program of the Chinese Academy of Sciences, and the 973 Key Programs of the MOST (grants 2010CB933501 and 2011CB935904). We gratefully thank Prof. R.-G. Xiong and his co-workers for their help on the dielectric and ferroelectric measurements and valuable discussions, Prof. X.-Y. Chen for the variable-temperature second harmonic generation measurement, and the reviewers for their excellent suggestions.

Abstract

original image

Ein H-Brücken-gebundener ionischer Cokristall mit Imidazol als molekularem Rotator und L-Weinsäure als homochiraler Komponente erweist sich als displazives ferroelektrisches Material, das bei 252 K eine Phasenumwandlung von paraelektrisch nach ferroelektrisch durchläuft (siehe Bild). Das außergewöhnliche dielektrische Verhalten wird durch Atomverschiebungen ausgelöst.

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