Effect of Zinc additive on dielectric properties of Cd-Se glassy system

来源 :自然科学进展(英文版) | 被引量 : 0次 | 上传用户:angle4781
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Cd5Se95–xZnx (x ? 0, 2, 4, 6) glassy alloy has been prepared by a melt-quenching technique. Thin films were deposited by thermal coating unit on ultraclean glass substrate under a vacuum of 10–6 Torr. The absence of any sharp peaks in the X-ray diffraction confirms the amorphous nature of thin films. The frequency and temperature dependence of dielectric constant and dielectric loss in the frequency range of 1 kHz to 1 MHz and in the temperature range of 290–370 K were studied. Dielectric dispersion was observed when Zinc (Zn) was incorporated into the Cd–Se system. The increase in dielectric parameter with Zn concentration may be due to increase in defect states. The DC conductivity has been reported to investigate the effect of Zn concentration on DC conduction loss. The results are interpreted in term of dipolar theory for Cd5Se95 and Cd5Se93Zn2 samples, while the remaining samples have been explained on the basis of DC conduction loss. It was also observed that the DC conductivity increased with the increase of Zinc concentration, which may be due to the decrease in the band gap near Fermi level.
其他文献
分别对 30 0mmol·L-1NaCl和 10 0mmol·L-1Na2 CO3 盐碱胁迫下的羊草苗进行以不同方式施加Ca2 +、ABA和H3PO4 等缓解胁迫处理 .结果表明 ,外施Ca2 +、ABA和H3PO4 明显缓解了盐碱对羊草生长的抑制作用 .叶面喷施效果好于根部处理 ;施用Ca(NO3) 2 效果好于施用CaCl2 效果 ;混合施用CaCl2 和ABA的效果比单独施用ABA或CaCl
期刊
Silver sulfadiazine (SSD) particles in homogeneous dispersion state were prepared by an ultrasonic method and then nano-and microparticles were separated using
Series of(Ag)x/(Cu0.5Tl0.5Ba2Ca2Cu3O10-δ) {(Ag)x/Cu Tl-1223} nano-superconductor composites were synthesized with different concentrations(i.e. x ? 0 4.0 wt%)
讨论了沼泽湿地优势种小叶樟 (Calamagrostisangustifolia)和毛果苔草 (Carexlasiocarpa)生物量和生长率变化情况 ,不同生长期各器官中N素含量及储量动态变化 ,以及植物对N素利用和区域养分限制情况 .结果表明 ,两种植物地上生物量生长符合模式p =γ +αt + βt2 ,地下生物量符合曲线p =a0 +b0 t ;受土壤水分、养分、气温和植物本身特点及其对N
期刊
小贵是贵金属投资界的菜鸟一枚,初入江湖,啥都不懂,还容易冲动,平日里,投资只知跟风猜顶猜底,到头来被残酷的江湖现实打击得体无完肤。然而,牛脾气的小贵最不怕的就是挫折。
Tunable full color emissive Y2.94 ? xAl5O12:0.06Dy3 t , xEu3 t (YAG:0.06Dy, xEu) phosphors with emission peaks at 483 nm (blue), 582 nm (yellow) and 610 nm (red
以三江平原沼泽湿地主要优势植物小叶樟 (Deyeuxiaangustifolia)和毛果苔草 (Carexlasiocarpa)枯落物为例 ,探讨了N素在枯落物中的季节变化、含量特征以及对维持生态系统物质平衡的作用 .结果表明 ,枯落物N含量随气温升高和地上生物量增大而减少 ;枯落物失重率随时间延长而增大 ;小叶樟年累积失重率为32 2 % ,毛果苔草为 2 7.7% ;小叶樟群落N素年累积输入
期刊
4月21日,由中国工商银行牵头主承销和担任簿记管理人的招商局港口2017年第一期中期票据在全国银行间债券市场成功完成发行。这是国内首支“一带一路”建设中期熊猫债,首期募
南京新街口作为省会城市的CBD,是商务商贸活动的集聚区,也是全市最具城市历史文化底蕴的都市核心区。目前,新街口分属于秦淮、鼓楼和玄武三个区管辖,而主要的商业设施都集中在秦
Nickel ferrite NiFe2O4 is a typical soft magnetic ferrite with high electrical resistivity used as high frequency magnetic material. Neodymium (Nd3 t ) doped Ni