Hock R (2003)
Publication Status: Published
Publication Type: Conference contribution
Publication year: 2003
Publisher: IOP PUBLISHING LTD
Book Volume: 36
Pages Range: A172-A176
Journal Issue: 10A
The paper examines the kinetics of the electric field induced, first-order transition from the commensurate to the ferro-electric phase in thiourea (SC(NH2)(2)) at 170 K. The satellite reflection from the modulated phase, locked in with a wave vector q = 1/9b* disappears when the phase transition is induced by a static electric field E-c along the a-axis. In order to study the kinetics of the phase transition, an oscillating electric voltage of rectangular shape was applied to the sample and photon events were acquired separately for ON- and OFF-field half-periods. Results received in a series of measurements at different amplitudes between 0 and 500 V and frequencies between 0.125 and 512 Hz lead to the conclusion that a slow and a fast relaxation time play a role for the OFF --> ON and the ON --> OFF transitions, respectively. Further, the highest frequency at which the phase transformation still follows the switching of the electric field depends linearly on the applied field amplitude. A qualitative explanation of the experimental results is given in terms of nucleation and growth of specific ferro-electric domains.
APA:
Hock, R. (2003). Kinetics of the field induced commensurate to ferro-electric phase transition in thiourea. (pp. A172-A176). IOP PUBLISHING LTD.
MLA:
Hock, Rainer. "Kinetics of the field induced commensurate to ferro-electric phase transition in thiourea." IOP PUBLISHING LTD, 2003. A172-A176.
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