检索结果-南通市图书馆

Dielectric properties,electrical modulus and current transport mechanisms of Au/ZnO/n-Si structures

Progress in Natural Science:Materials International 2018年第3期28卷 325-331页

作者： Yosef Badali ?emsettin Alt?ndal ?brahim Uslu Department of Advanced Technologies Institute of Science and TechnologyGazi University Department of Physics Faculty of ScienceGazi University Department of Chemistry Education Faculty of EducationGazi University

Au/Zn O/n-Si（MIS）structures were fabricated by using the RF sputtering method and their complex dielectric constant（ε*=ε’-jε’’）,electric modulus（M*=M′+j M’’）and electrical conductivity(σ=σdc+σac)values were investigated as a function of frequency（0.7 k Hz-1 MHz）and voltage(-6–（+6 V）)by capacitance-voltage（C-V）and conductance-voltage（G/ω-V）measurements to get more information on the conduction mechanisms and formation of barrier height between Au and *** lnσ-Lnf plots have two different regions corresponding to low-intermediate and high *** behavior of lnσ-lnf plots shows that the existence of two different conduction mechanisms（CMs）at low-intermediate and high ***,the reverse bias saturation current（I_o）,ideality factor（n）,barrier height(ΦBo)were determined from the forward bias I-V data and they were found as a strong function of *** value of n especially at low temperature is considerably higher than *** values ofΦB0and standard deviation（σs）were found from the intercept and slope ofΦBo-q/2k T plots as 0.551 e V and 0.075 V for the region I（80–220 K）and 1.126 e V and 0.053 V for the region II（220–400 K）,*** values ofΦBoand effective Richardson constant（A*）were found from slope and intercept of activation energy plots as 0.564 e V and 101.084 Acm-2K-2for the region I and 1.136 e V and41.87 Acm-2K-2for the region II,*** results confirm that the current-voltage-temperature（I-V-T）characteristics of the fabricated Au/Zn O/n-Si SBDs can satisfactorily be explained on the basis of TE theory with double GD of the BHs.

关键词： Au/ZnO/n-Si Dielectric properties electrical modulus Current-transport mechanism Double-Gaussian distribution Barrier height

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

MORPHOTROPIC PHASE BOUNDARY AND DIELECTRIC RELAXATION STUDY OF(Bi_(0.5)Na_(0.5))TiO_(3)-BaTiO_(3)LEAD-FREE CERAMIC

引用

Journal of Advanced Dielectrics 2012年第3期2卷 34-46页

作者： B.PARIJA S.PANIGRAHI T.BADAPANDA T.P.SINHA Department of Physics National Institute of Technology Rourkela-769008India C.V.Raman College of Engineering Bhubaneswar Department of Physics Bose Institute 93/1 A.P.C.RoadKolkata-700009India

We report the temperature and frequency dependence impedance spectroscopy of(1-x)(Bi_(0.5)Na_(0.5))TiO_(3-x)BaTiO_(3)(abbreviated as BNT-BT)ceramics with 0≤x≤0.07 prepared by conventional solid-state route.X-ray diffraction analysis indicated that a solid solution is formed when BaTiO_(3)diffuses into the(Bi_(0.5)Na_(0.5))TiO_(3)lattice and a morphotropic phase boundary between rhombohedral and tetragonal locates at x=*** microstructure indicated that the grain size reduces and the shape changes from rectangular to quasi-spherical with increase in BaTiO_(3)*** Impedance Spectroscopy analysis suggested the presence of temperature-dependent relaxation process in the *** modulus mechanism indicated the nonDebye type of conductivity relaxation in the materials,which is supported by impedance *** activation energies have been calculated from impedance,electric modulus studies and dc conductivity which suggests that the conductions are ionic in *** activation energy increases with increase of BT content up to x=0.05 and decreases at x=0.07 which also indicates the presence of morphotropic phase boundary at x=0.07.

关键词： Morphtropic phase boundary(MPB) impedance spectroscopy electrical modulus relaxations conductivity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electric modulus Analysis of Carbon Black/Copolymer Composite Materials

引用

Materials Sciences and Applications 2011年第10期2卷 1421-1426页

作者： Mohamed El Hasnaoui Manuel Pedro Fernanades Graca Mohammed Essaid Achour Luis Cadillon Costa Laboratoire LASTID Departement de PhysiqueFaculte des SciencesUniversite Ibn TofailKenitraMorocco I3N and Physics Department University of AveiroAveiroPortugal

We have investigated the electrical properties of carbon black (CB) loaded in ethylene butylacrylate copolymer composite (EBA) in the frequency range between 102 and 104 Hz and temperature range between 153 and 353 K. The frequency dependence of electrical data that have been analyzed in two frameworks: the electrical modulus formalism with the Kohlrausch-Williams-Watts stretched exponential function (KWW) and the electrical conductivity by using the Jonscher’s power law in the frequency domain. The stretching exponent βKWW and n are found to be temperature independent for all CB fractions and to be decreased when the CB volume concentrations loaded in copolymer matrix increases. It is found that the activation energy obtained by the modulus method is in good agreement with that obtained by the DC conductivity in the power law which is independent on the CB contents that exist in the copolymer matrix, suggesting that these particles do not interact significantly with the chain segments of the macromolecules in the EBA copolymer.

关键词： electrical modulus Polymer Matrix Nanocomposites Conducting Particles

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：