| Long—Range Effects on the Pyroelectric Coefficient of Ferroelectric Superlattice |
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| 引用本文： | DONGWen WUYin－Zhong 等.Long—Range Effects on the Pyroelectric Coefficient of Ferroelectric Superlattice[J].理论物理通讯,2002,38(6):743-748. |
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| 作者姓名： | DONGWen WUYin－Zhong |
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| 作者单位： | [1]DepartmentofPhysics,SuzhouUniversity,Suzhou215006,China [2]DepartmentofPhysics,SuzhouUniversity,Suzhou215006,China；DepartmentofPhysics,ChangshuCollege,Changshu215500,China |
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| 摘 要： | Long-range effects on the pyroelectric coefficient of a ferroelectric superlattice consisting of two different ferroelectric materials are investigated based on the transverse Ising model.The effects of the interfacial coupling and the thickness of one period on the pyroelectric coefficient of the ferroelectric superlattics are studied by taking into account the long-range interaction.It is found that with the increase of the strength of the long-range interaction,the pyroelectric coefficient decreases when the temperature is lower than the phase transition temperature;the mumber of the pyroelectric peaks decreases gradually and the phase transition temperature increases,It is also found that with the decrease of the interfacial coupling and the thickness of one period.the phase transition temperature and the number of the pyroelectric peaks decrease.
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| 关 键 词： | 铁电体 长程作用 热电系数 |
| 收稿时间： | 2002-04-03 |
Long-Range Effects
on the Pyroelectric Coefficient of Ferroelectric Superlattice |
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| DONG Wen,YAO Dong-Lai,WU Yin-Zhong,LI Zhen-Ya.Long-Range Effects
on the Pyroelectric Coefficient of Ferroelectric Superlattice[J].Communications in Theoretical Physics,2002,38(6):743-748. |
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| Authors: | DONG Wen YAO Dong-Lai WU Yin-Zhong LI Zhen-Ya |
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| Institution: | 1. Department of Physics, Suzhou University, Suzhou 215006,
China
;2. Department of Physics, Changshu College, Changshu 215500, China
;3. 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 different ferroelectric materials are investigated based on the transverse Ising model. The effects of the interfacial coupling and the thickness
of one period on the pyroelectric coefficient of the ferroelectric superlattice are studied by taking into account the long-range interaction. It is found that with the increase of the strength of the long-range interaction, the pyroelectric coefficient
decreases when the temperature is lower than the phase transition temperature; the number of the pyroelectric peaks decreases gradually and the phase transition temperature increases. It is also found that with the decrease of the interfacial coupling and the thickness of one period, the phase transition temperature and the
number of the pyroelectric peaks decrease. |
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| Keywords: | long-range interaction ferroelectric superlattice pyroelectric coefficient |
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