Study of ferroelectric characteristics of diisopropylammonium bromide films

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Title
Study of ferroelectric characteristics of diisopropylammonium bromide films
Author(s)
C. Thirmal; P. P. Biswas; Yeong Jae Shin; Taewon Noh; N. V. Giridharan; A. Venimadhav; P. Murugavel
Publication Date
2016-09
Journal
JOURNAL OF APPLIED PHYSICS, v.120, no.12, pp.124107 -
Publisher
AMER INST PHYSICS
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 organic films and demonstrated its room temperature ferroelectric characteristics. Published by AIP Publishing
URI
https://pr.ibs.re.kr/handle/8788114/3055
ISSN
0021-8979
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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