Long-Range Effects on the Pyroelectric Coefficient of Ferroelectric Superlattice |
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| Authors: | DONG Wen YAO Dong-Lai WU Yin-Zhong LI Zhen-ya |
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| Institution: | Department of Physics, Suzhou University, Suzhou 215006, China Department of Physics, Suzhou University, Suzhou 215006, China Department of Physics, Suzhou University, Suzhou 215006, China;Department of Physics, Changshu College, Changshu 215500, China Department of Physics, Suzhou University, Suzhou 215006, China;CCAST World Laboratory, P.O. Box 8730, Beijing 100080, China |
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| Abstract: | Long-range effects on the pyroelectric coefficient of a ferroelectric superlattice consisting of two differentferroelectric materials are investigated based on the transverse Ising model. The effects of the interfacial coupling andthe thickness of one period on the pyroelectric coefficient of the ferroelectric superlattice are studied by taking intoaccount the long-range interaction. It is found that with the increase of the strength of the long-range interaction, thepyroelectric coefficient decreases when the temperature is lower than the phase transition temperature; the number ofthe pyroelectric peaks decreases gradually and the phase transition temperature increases. It is also found that with thedecrease of the interfacial coupling and the thickness of one period, the phase transition temperature and the number ofthe pyroelectric peaks decrease. |
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| Keywords: | long-range interaction ferroelectric superlattice pyroelectric coefficient |
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