PbZr_(0.3)Ti_(0.7)O_3/PbTiO_3超晶格的热释电性研究

Pyroelectric effect in PbZr_(0.3)Ti_(0.7)O_3/PbTiO_3 superlattices

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摘要基于朗道-金兹堡格-德文希尔(Landau-Ginzburg-Devonshire)热力学理论,我们研究了由PbZr0.3Ti0.7O3(PZT)与PbTiO3(PT)两种组份组成的超晶格的热释电性,并且考虑了两组份之间的失配应变的影响.我们探讨了界面耦合强度、组分厚度比例以及失配应变等对超晶格的极化强度和热释电性的影响.计算结果表明,这种铁电超晶格材料具有巨大的热释电系数.因此,我们可以通过调节界面耦合强度、组份比例等方法达到调控热释电性的目的,为实验和应用研究提供一个可靠而有效的方法. Based on the Landau-Ginzburg-Devonshire theory,the pyroelectric effect of ferroelectric superlattices PbZr0.3Ti0.7O3/PbTiO3 has been investigated,in which the misfit strain between the two slabs is taken into account.The impact of interfacial coupling strength,composition concentration proportion of PbZr0.3Ti0.7O3 slab in one period on the pyroelectric coefficient has been calculated.It is found that the ferroelectric superlattice displays pronounced pyroelectric effect.Essentially,the ferroelectric superlattices provide an effective means to acquire good pyroelectric effect by adjusting the interfacial coupling strength,as well as compositional thickness concentration.

作者陈加文戴大鹏曹海霞

机构地区苏州大学物理科学与技术学院

出处《苏州大学学报（自然科学版）》 CAS 2011年第2期63-67,共5页 Journal of Soochow University(Natural Science Edition)

基金国家自然科学基金(50832002 10904101) 江苏省高校自然科学基金(08KJB140006)

关键词热释电系数超晶格朗道-金兹堡格-德文希尔理论 pyroelectric cofficient superlattices Landau-Ginzburg-Devonshire theory

分类号 O469 [理学—凝聚态物理]

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苏州大学学报（自然科学版）

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PbZr_(0.3)Ti_(0.7)O_3/PbTiO_3超晶格的热释电性研究

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