Journal ArticleDOI
Study of ferroelectric characteristics of diisopropylammonium bromide films
Ch. Thirmal,Pranab Parimal Biswas,Yeong Jae Shin,Tae-Hee Noh,N.V. Giridharan,A. Venimadhav,Pattukkannu Murugavel +6 more
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TLDR
In this article, a thick film of diisopropylammonium bromide organic molecular ferroelectric is fabricated on the ITO/glass substrate and a butterfly loop in amplitude and hysteretic character of the phase is revealed, which are the expected characteristics features of ferroelectrics.Abstract:
Organic molecular ferroelectrics are highly desirable due to their numerous advantages. In the present work, a thick film of diisopropylammonium bromide organic molecular ferroelectric is fabricated on the ITO/glass substrate. The grown film shows preferential orientation along the c-axis with a ferroelectric transition at 419 K. The piezoresponse force microscopic measurements are done in a dual ac resonance tracking mode for its switching characteristics. The amplitude and phase images of the oppositely written domain patterns exhibit a clear contrast with 180° phase difference. The dynamical spectroscopic studies reveal a butterfly loop in amplitude and hysteretic character of the phase which are the expected characteristics features of ferroelectrics. In addition, the macroscopic polarization versus electric field hysteresis gives an additional proof for ferroelectric character of the film with the maximum polarization of 3.5 μC/cm2. Overall, we have successfully fabricated diisopropylammonium bromide...read more
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Observation of ferroelectric phase and large spontaneous electric polarization in organic salt of diisopropylammonium iodide
Ravi Kiran Saripalli,Diptikanta Swain,Siva Prasad,Hariharan Nhalil,H. L. Bhat,Tayur N. Guru Row,Suja Elizabeth +6 more
TL;DR: In this article, the authors explore diisopropylammonium iodide (DPI) for its ferroelectric properties and phase transitions and identify two phase transitions which were identified by differential scanning calorimetry and dielectric and nonlinear optical measurements.
Journal ArticleDOI
A novel all-organic DIPAB/PVDF composite film with high dielectric permittivity
Wenlong Yang,Haidong Li,Jiaqi Lin,Gaoru Chen,Yu Wang,Li Wang,Haowei Lu,Liang-Yu Chen,Qingquan Lei +8 more
TL;DR: In this article, a novel all-organic composite comprising polyvinylidene fluoride (PVDF) and diisopropylammonium bromide (DIPAB) crystal particles with significant dielectric properties has been synthesized via coating method.
Journal ArticleDOI
Size Effect in Nanocomposites Based on Molecular Ferroelectric Diisopropylammonium Bromide
TL;DR: In this paper, the dielectric properties of Al2O3 oxide films with a pore size of 330 and 60 nm with particles of an organic ferroelectric diisopropylammonium bromide (C6H16BrN, DIPAB) introduced into the pores, aimed at determining the size dependences of phase transition parameters.
Journal ArticleDOI
Polarization canting in ferroelectric diisopropylammonium-halide molecular crystals: a computational first principles study
Lydie Louis,Krishna Chaitanya Pitike,Ayana Ghosh,Shashi Poddar,Stephen Ducharme,Serge Nakhmanson +5 more
TL;DR: In this paper, the results of a computational first-principles study of the structural and electrical properties of three ferroelectric diisopropylammonium halides containing chlorine, bromine, and iodine were reported.
Journal ArticleDOI
Dielectric properties of an organic ferroelectric of bromide diisopropylammonium embedded into the pores of nanosized Al 2 O 3 films.
TL;DR: The study presents experimental results for investigating linear and nonlinear dielectric properties of nanocomposites based on bromide diisopropylammonium and aluminum oxide films and indicated that the phase transition was blurred and shifted toward lower temperatures.
References
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Journal ArticleDOI
Design of Ferroelectric Organic Molecular Crystals with Ultrahigh Polarization
Shuang Chen,Xiao Cheng Zeng +1 more
TL;DR: If these newly designed TTF- and PMDI-based crystals with high polarizations are confirmed by experiments, the computer-aided ferroelectric material design on the basis of hydrogen-bonded charge-transfer complexes with flexible electron-donor and acceptor molecules would be proven valuable for expediting the search of room-temperature "displasive-type" ferroElectric organic crystals.
Journal ArticleDOI
Nucleation, growth, and control of ferroelectric-ferroelastic domains in thin polycrystalline films
TL;DR: In this paper, the authors used piezoresponse force microscopy to study the switching mechanisms of ferroelectric-ferroelastic domains in thin polycrystalline Pb${}_{0.7}$Zr${}_0.3}$TiO${}
Journal ArticleDOI
Strong Improper Ferroelasticity and Weak Canted Ferroelectricity in a Martensitic-Like Phase Transition of Diisobutylammonium Bromide.
Anna Piecha-Bisiorek,Agata Białońska,Ryszard Jakubas,Piotr Zieliński,Martyna Wojciechowska,Mirosław Gałązka +5 more
TL;DR: Diisobutylammonium bromide is found to be a unique improper ferroelastic in which the elastic degrees of freedom seem to play the essential role, giving rise to a domain pattern resembling that of martensitic phase transitions.
Journal ArticleDOI
Organic memory device based on 3,3 ' -bis-(3,5-di-tert-butyl-4- methoxyphenyl)-2,2 ' -bithiophene with high endurance and robustness to ambient air operation
Mario Caironi,Dario Natali,Marco Sampietro,Chiara Bertarelli,Andrea Bianco,A. Dundulachi,Eleonora Valeria Canesi,Giuseppe Zerbi +7 more
TL;DR: A conductance switching memory cell based on 3,3′-bis-(3,5-di-tert-butyl-4-methoxyphenyl)-2,2′-bithiophene, showing long time retention, very high endurance to electrical stress, and operation in ambient air condition, is presented and the switching mechanism is investigated by comparing cells with aluminum and mercury top metal contacts as mentioned in this paper.
Journal ArticleDOI
Impedance spectroscopic analysis of the organic ferroelectric – Diisopropylammonium bromide (DIPAB)
TL;DR: In this paper, the dielectric and ac conductivity of the organic molecular ferroelectric, diisopropylammonium bromide polycrystalline sample were investigated.