Model of Temperature Dependence of Spontaneous Polarization of Thiourea Monocrystal in Phase I |
| I. Śliwa and W. Wanarski
Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, PL 60-179 Poznań, Poland |
| Received: November 15, 2011; In final form: February 8, 2012 |
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| In this paper we present a model of spontaneous polarization appearing in the crystal of thiourea in phase I, constructed on the basis of the molecular field theory, with the use of the Boltzmann statistics. The model employs the potential energy of interaction between two nonpunctual molecular electric dipoles performing reorientations within the constraints specified by the experimentally determined structural data. The temperature dependences of the spontaneous polarization for different values of the hydrostatic pressure and for different γ-ray doses were obtained. A comparison between theoretical and experimental results permitted calculation of the parameters of the theory presented. |
| DOI: 10.12693/APhysPolA.122.184 PACS numbers: 77.80.Bh, 77.80.-e |