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Phase Transition and Oxygen Ion Diffusion in (La1-xLnx)2Mo2O9 (Ln=Nd, Gd, x=0.05-0.25) Using Dielectric Relaxation Method
Qian-feng Fang¤,Zhong Zhuang,Xian-ping Wang,Dan Li,Jian-xin Wang
Author NameAffiliationE-mail
Qian-feng Fang¤ Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315040, China; Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,Hefei 230031, China qffang@issp.ac.cn 
Zhong Zhuang Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,Hefei 230031, China  
Xian-ping Wang Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315040, China; Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,Hefei 230031, China  
Dan Li Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,Hefei 230031, China  
Jian-xin Wang Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315040, China  
Abstract:
Monte Carlo simulations were used to study the translocation of a flexible polymer through a pore in a membrane, assuming an attractive interaction between the monomers and the membrane on the trans side of the membrane and no interaction on the cis side. For the case TTc, τ increases with increasing temperature. The translocation time depends on the absorbed energy u0 in a nontrivial way. The value of τ increases initially upon increasing u0 before it begins to decrease.
Key words:  Oxide-ion conductor, La2Mo2O9, Dielectric relaxation, Oxygen ion diffusion
FundProject:市自然科学基金,国家自然科学基金
Phase Transition and Oxygen Ion Diffusion in (La1-xLnx)2Mo2O9 (Ln=Nd, Gd, x=0.05-0.25) Using Dielectric Relaxation Method
方前锋¤,庄重,王先平,李丹,王建新
摘要:
采用介电弛豫方法研究了氧离子导体(La1-xRex)2Mo2O9(Re=Nd, Gd, x=0.05-0.25)中氧离子扩散和相变行为. 观察到了两个介电损耗峰:第一个峰Pd在600 K附近,第二个峰Ph在720 K左右.Pd峰为弛豫型介电损耗峰,是由氧离子的短程扩散导致的. 随着频率增加,Ph峰基本上不随频率移动,但是峰高随着频率显著的下降.Ph峰表现出非弛豫型的本质,对应于氧离子和氧空位的分布从静态无序到动态无序的转变过程. 随着掺杂浓度的增加,Pd峰和Ph峰的峰高先是增加,在15%的掺杂量达到最高后开始降低. 与此对应,电导率也在此掺杂浓度下出现最大值.
关键词:  氧离子导体,La2Mo2O9,介电弛豫,氧离子扩散
DOI:10.1088/1674-0068/21/03/270-274
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