...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica, B. Condensed Matter >Correlation between ionic size and valence state of tetra, penta and hexavalent B-site substitution with solubility limit, phase transformation and multiferroic properties of Bi0.875Eu0.125FeO3
【24h】

Correlation between ionic size and valence state of tetra, penta and hexavalent B-site substitution with solubility limit, phase transformation and multiferroic properties of Bi0.875Eu0.125FeO3

机译：具有溶解度极限，相变性和六价B位取代的离子尺寸与价态与BI0.875E0.125FeO3的相变性和多二态性能的相关性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present detailed comparative study of effect of isovalent i. e. Eu+3 substitution at A-site and tetra (Ti+4, Zr+4), penta (V+5) and hexavalent (W+6()) substitutions at B-site in BiFeO3. Eu+3 substitution led to phase transformation and exhibited mixed phases i. e. rhombohedral and orthorhombic, while tetravalent substituents (Ti+4 and Zr+4) led to stabilization of cubic phase. In higher valent (i. e. V+5 and W+6) cases solubility limit was significantly reduced where orthorhombic phase was observed as in the case of parent compound. Phase transformation as a consequence of increase in microstrain and chemical pressure induced by the substituent has been discussed. Solubility limit of different B-site dopants i. e. Zr, W and V was extracted to 5%, 2% and 2%, respectively. Extra phases in various cases were Bi2Fe4O9, Bi25FeO40, Bi14W2O27, and Bi23V4O44.5 and their fractional amount have been quantified. Ti was substituted up to 15% and has been observed to be completely soluble in the parent compound. Solubility limits depends on ionic radii mismatch and valance difference of Fe+3 and dopant, in which valance difference plays more dominant role. Solubility limit and phase transformation has been explained in terms of change in bond strength and tolerance factor induced by incorporation of dopant which depend on its size and valence state. Detail optical, dielectric, ferroelectric, magnetic and transport properties of Eu and Ti codoped samples and selected low concentration B-site doped compositions (i. e. 2%) have presented and discussed. Two d-d transitions and three charge transfer transitions were observed within UV-VIS range. Both change in cell volume for the same phase and transformation in crystal structure affects the band gap. Increase in room temperature dielectric constant and saturation polarization was also found to increase in case of Eu-Ti co-doped samples with increasing concentration of Ti. Substitution of Eu at A-site and Ti at B-site led to obser
机译：我们介绍了对Isopalent I的影响的详细比较研究。 e。 Eu + 3在Bifeo3中的B型位点和四（Ti + 4，Zr + 4），Penta（v + 5）和六价（W + 6（）六价（W + 6（））取代的替代品。欧盟+ 3替换导致相变，表现出混合阶段。 e。 rhombohedral和正交，而四价取代基（Ti + 4和Zr + 4）导致立方相稳定。在更高的角度（即v + 5和W + 6）案例中，溶解度极限显着降低，在母体化合物的情况下观察到正晶相。已经讨论了主要纹理和由取代基诱导的化学压力增加的相变。不同B位掺杂剂I的溶解度极限。 e。 Zr，W和V分别提取至5％，2％和2％。各种病例的额外阶段是Bi2Fe4O9，Bi25FeO40，Bi14W2O27和Bi23V4O44.5和它们的分数量已经量化。 Ti被取代至15％，已被观察到完全可溶于母体化合物中。溶解度限制取决于Fe + 3和掺杂剂的离子半径不匹配和平衡差异，其中帷幔差异起到更大的作用。通过掺入掺杂剂掺入其尺寸和价状态的掺杂剂诱导的粘合强度和耐受因子的变化，已经解释了溶解度极限和相变。详细的光学，介电，铁电，磁共振，欧盟和Ti编排样品的磁性和运输性能，并选择低浓度B位掺杂组合物（即2％）已经提出和讨论过。在UV-VIS范围内观察到两个D-D转换和三次电荷转移转变。相同相位的细胞体积的变化和晶体结构中的变换影响了带隙。室温介电常数和饱和偏振的增加也发现，在Eu-Ti共掺杂样品随着Ti的浓度增加而增加。在B-遗址的A-urity和TI的eu取代导致观察者

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号