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利用维度和缺陷减轻来创建可调节的微波介电器.

Che-Hui Lee1, Nathan D Orloff, Turan Birol

  • 11] Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA [2] Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA [3].

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概括

研究人员为微波电路开发了低损耗,可调节的薄膜. 这些Srn+1TinO3n+1材料通过调整层分离,提供高调节性,优于现有的调节性介电材料.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 电气工程 电气工程

背景情况:

  • 微波电路的小型化需要可调节的薄膜,具有可调节的介电常数.
  • 像BaxSr1-xTiO3这样的现有材料提供了可调性,但遭受了高介电损失.
  • 薄膜中缺陷引起的损失阻碍了先进电子设备的发展.

研究的目的:

  • 探索Srn+1TinO3n+1相作为可调节微波介电器的低损耗替代品.
  • 调查晶体结构和介电可调性之间的关系.
  • 为了实现可调节微波应用的高功率.

主要方法:

  • 合成Srn+1TinO3n+1相,其"n"值各不相同 (n ≥3).
  • 双轴应变应用以诱导铁电不稳定性.
  • 在千兆赫兹频率 (高达125 GHz) 的介电性质的表征.

主要成果:

  • 在双轴应力Srn+1TinO3n+1阶段实验实现高度可调的基态.
  • 演示可调节的介电常数直至125 GHz.
  • 确定"n" (层分离) 作为控制铁电不稳定性和鱼能力的关键参数.

结论:

  • Srn+1TinO3n+1相为低损耗,可调节的微波介电器提供了一种新的方法.
  • 通过"n"调整 (SrO) 2平面的分离,提供了一种增强铁电不稳定的新方法.
  • 取得的优点数字与室温下现有的可调微波介电器相竞争.