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Dielectric properties of ferroelectric diisopropylammonium iodide

Authors: 

A. Yu Milinskiy,  S. V. Baryshnikov, I. V. Egorova and Hoai Thuong Nguyen

Source title: 
Phase Transitions, 92(4): 406-410, 2019 (ISI)
Academic year of acceptance: 
2018-2019
Abstract: 

Temperature dependences of dielectric constant, amplitude of the third harmonic and heat capacity for the organic ferroelectric of diisopropylammonium iodide (C6H16NI) have been investigated. The measurements were carried out through heating and cooling cycles in the range of 300–400 K. It was found that upon the first heating, only one phase transition occurred without the presence of the ferroelectric phase. For samples preheated over 420 K, two phase transitions at 363 and 378 K appeared in the heating process, and the ferroelectric state was also observed between them. Upon cooling, the ferroelectric phase was detected in the range of lower 361 K and persisted up to room temperature.