...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS Omega >Ho and Ti Co-Substitution Tailored Structural Phase Transition and Enhanced Magnetic Properties of BiFeO3 Thin Films
【24h】

Ho and Ti Co-Substitution Tailored Structural Phase Transition and Enhanced Magnetic Properties of BiFeO3 Thin Films

机译：HO和TI共替代量定制的结构相转变和增强BIFEO3薄膜的磁性

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The polycrystalline thin films of BiFeO_(3) (BFO) and Bi_(0.90)Ho_(0.10)Fe_(1–x)Ti_(x)O (x = 0, 0.025, 0.05, 0.10, 0.15, and 0.20) were successfully synthesized by the simple sol–gel method. X-ray diffraction and Raman spectra revealed the substitution of Bi and Fe by Ho and Ti, respectively, and correspondingly a structural phase transition from the rhombohedral phase to orthorhombic phase. The field-emission scanning electron microscopy and transmission electron microscopy images indicated that the average size of the particles was decreased and the surface homogeneous agglomeration was enhanced with the increased concentration of Ti to x = 0.05. The X-ray photoelectron spectroscopy measurements illustrated that Fe~(3+) and O~(2–) ions tended to increase with the Ti concentration increase, which accounted for the enhanced super-exchange interaction between Fe~(3+) and O~(2–). Because of the reduced concentration of oxygen vacancies, Ho and Ti ions with a smaller ionic radius and denser surface structure, the Ho and Ti co-substituted films with an appropriate concentration of Ti (x = 0.05) showed an optimal saturation magnetization (M _(s)) of 44.23 emu/cm~(3) and remanent magnetization (M _(r)) of 4.62 emu/cm~(3), which were approximately 1.8 times and 1.9 times than that of the pure BFO, respectively. This work opened up an effective way to modulate the structure and properties of BFO-based materials.
机译：BifeO_（3）（BFO）和Bi_（0.90）HO_（0.10）Fe_（1-x）Ti_（x）O（x = 0,0.025,0.05,0.10,0.15和0.20）的多晶薄膜成功通过简单的溶胶 - 凝胶法合成。 X射线衍射和拉曼光谱揭示了HO和Ti的替代Bi和Fe，并且相应地从菱形相到正交相的结构相转变。现场排放扫描电子显微镜和透射电子显微镜图像表明，颗粒的平均尺寸降低，并随着Ti的浓度增加到 x = 0.05，增强了表面均匀附聚。 X射线光电子体光谱测量结果说明了Fe〜（3+）和O〜（2-）离子随着Ti浓度的增加而增加，这占Fe〜（3+）和O之间的增强的超交换相互作用〜（2-）。由于氧空位浓度降低，具有较小的离子半径和更密集的表面结构的HO和Ti离子，HO和Ti的具有适当浓度的Ti（ x = 0.05）的Co-取代的薄膜显示出最佳饱和磁化强度（ m _（s））为44.23 emu / cm〜（3）和4.62 emu / cm〜（3）的剩余磁化（ m _（r）），约为1.8倍和1.9倍而不是纯粹的bfo。这项工作开辟了一种有效的方法来调制基于BFO的材料的结构和性质。

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