New Organic Ferroelectrics: Cocrystal of 5,5′-Dimethyl-2,2′-bipyridine and Bromanilic Acid

New Organic Ferroelectrics: Cocrystal of 5,5′-Dimethyl-2,2′-bipyridine and Bromanilic Acid

Cocrystal 55DMBP–H2ba was synthesized and characterized. The crystal structure is isostructural to cocrystal 55DMBP–H2ia with iodanilic acid. The heat capacity, dielectric permittivity, and polarization–electric field hysteresis showed that the 55DMBP–H2ba undergoes a paraelectric–ferroelectic phase...

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Veröffentlicht in:Chemistry letters 2012, Vol.41 (1), p.119-121
Hauptverfasser: Yamamura, Yasuhisa, Saito, Erika, Saitoh, Hideki, Hoshino, Norie, Saito, Kazuya
Format: Artikel
Sprache:eng
Schlagworte:
Crystal structure
Dielectric constant
Dielectrics
Ferroelectric materials
Heat capacity
Hysteresis
Permittivity
Polarization
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Zusammenfassung:Cocrystal 55DMBP–H2ba was synthesized and characterized. The crystal structure is isostructural to cocrystal 55DMBP–H2ia with iodanilic acid. The heat capacity, dielectric permittivity, and polarization–electric field hysteresis showed that the 55DMBP–H2ba undergoes a paraelectric–ferroelectic phase transition at 253 K on cooling. The transition mechanism is discussed through the analysis of isotropic temperature factors of atoms.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2012.119