title: Large spontaneous polarization and clear hysteresis loop of a room-temperature hybrid ferroelectric based on mixed-halide [BiI3Cl2] polar chains and methylviologen dication.
abstract: The search for hybrid organic-inorganic materials, which have the great advantage that they can be synthesized at moderate temperature (T < 200 °C), remains a great challenge in the field of ferroelectrics. Here, a room-temperature ferroelectric material with interesting characteristics, (MV)[BiI(3)Cl(2)] (MV(2+) = methylviologen), is reported. Its structure is based on polar inorganic chains resulting from a remarkable Cl/I segregation induced by methylviologen entities, which coincide with the fourfold polar axis of the tetragonal structure. Of great importance is that this room-temperature hybrid ferroelectric displays a clear electrical hysteresis loop with a large spontaneous polarization (>15 μC·cm(-2)).
authors.affiliation: MOLTECH Anjou, UMR-CNRS 6200, Université d'Angers, Angers, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Leblanc
authors.forename: Nicolas
authors.initials: N
authors.lastname: Mercier
authors.forename: Leokadiya
authors.initials: L
authors.lastname: Zorina
authors.forename: Sergey
authors.initials: S
authors.lastname: Simonov
authors.forename: Pascale
authors.initials: P
authors.lastname: Auban-Senzier
authors.forename: Claude
authors.initials: C
authors.lastname: Pasquier