钛含量对PZT/STO铁电电容器隧穿电阻的影响

河北大学学报(自然科学版) ›› 2012, Vol. 32 ›› Issue (6): 587-591.

钛含量对PZT/STO铁电电容器隧穿电阻的影响

王英龙,刘林,梁伟华,丁学成,褚立志

河北大学物理科学与技术学院,河北保定,071002

出版日期:2012-11-25 发布日期:2012-11-25
基金资助:
河北省自然科学基金资助项目

Effects of Ti contents to the tunneling electroresistance of PZT/STO ferroelectric capacitors

WANG Yinglong,LIU Lin,LIANG Weihua,DING Xuecheng,CHU Lizhi

Online:2012-11-25 Published:2012-11-25

摘要/Abstract

摘要： 采用Landau-Devonshire自由能理论和晶格模型,研究了PbZr1-xTixO3(PZT)/SrTiO3(STO)复合薄膜中PZT的钛(Ti)含量(x=0.5,0.6,0.8,1.0)对铁电隧道结极化强度、总电势、电导和隧穿电阻等的影响,从而增大隧穿电阻.模拟结果表明:随着层数增加,复合薄膜极化强度增大;随着Ti含量增加,隧道结电导先减小后增大,其隧穿电阻率先增大后减小;PZT极化强度、STO总电势和PZT总电势的斜率均在x=0.8时最大.

关键词: 铁电电容器, 隧穿效应, Landau模型, PZT

中图分类号:

O469

王英龙,刘林,梁伟华,丁学成,褚立志. 钛含量对PZT/STO铁电电容器隧穿电阻的影响[J]. 河北大学学报(自然科学版), 2012, 32(6): 587-591.

WANG Yinglong,LIU Lin,LIANG Weihua,DING Xuecheng,CHU Lizhi. Effects of Ti contents to the tunneling electroresistance of PZT/STO ferroelectric capacitors[J]. Journal of Hebei University (Natural Science Edition), 2012, 32(6): 587-591.

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