Recently there is a surge in interest to develop new organic based ferroelectric materials suitable for electronic applications. They have the advantages of low processing temperatures, environmental compatibility, scalable to larger areas, inert to chemical reactions, light weight and/ or mechanical flexibility. This led to the discovery of several new organic molecular ferroelectrics such as triglycine sulfate, triglycine fluoberyllate etc. However, the low polarization values of these compounds restrict their application potential. Interestingly, the recent discovery of ferroelectricity in diisopropylammonium bromide (DIPAB) [1] with polarization value of 23  C/cm2, comparable to BaTiO3, along b-axis has renewed interest in this ferroelectric compound.  The present talk will be focused on the structural, dielectric and domain dynamical characteristics [2, 3] of the bulk DIPAB sample. In addition, the ferroelectric characteristics of DIPAB film on ITO/glass substrate will also be discussed. 

References:

1.         D. W. Fu, H. L. Cai, Y. Liu, Q. Ye, W. Zhang, Y. Zhang, X. Y. Chen, G. Giovannetti, M. Capone, J. Li and R. G. Xiong, Science 339, 425 (2013).

2.         C. Thirmal, P. Murugavel and V. Subramanian, Curr. Appl. Phys. 14, 688 (2014).

3.         H. Lu, T. Li, S. Poddar, O. Goit, A. Lipatov, A. Sinitskii, S. Ducharme, and A. Gruverman,  Adv. Mater. 27, 7832 (2015).