具有非中心对称l - ta2o5相关结构的介电材料Zr0.10Ta0.90O2.45

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-15 DOI:10.1063/5.0259303

Takanori Mimura, Suzuka Udagawa, Yoshiyuki Inaguma

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引用次数: 0

摘要

以Ta2O5和ZrO2粉末为原料，经1700℃热处理，通过固相反应合成了具有非中心对称l -Ta2O5相关结构的介电材料Zr0.10Ta0.90O2.45。确定该结构为c中心正交对称结构[a = 6.3717(2) Å， b = 10.8003(4) Å， c = 3.87058（12） Å]，用L ' -Ta2O5表示。可能的空间组有：C222、Cmm2、C2mm、Cm2m。与传统的L- ta2o5相关结构相比，L ' - ta2o5型Zr0.10Ta0.90O2.45具有较强的二次谐波产生信号和较高的介电常数55。高温x射线衍射表明，在400 K左右相变为L″-Ta2O5相，具有准六方结构。介电常数的温度依赖性表明，相位的最大值为60，这归因于相变。Zr0.10Ta0.90O2.45是非中心对称材料的互补金属氧化物-半导体兼容器件的潜在候选材料。

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A dielectric material, Zr0.10Ta0.90O2.45, with a noncentrosymmetric L-Ta2O5-related structure

A dielectric material with a noncentrosymmetric L-Ta2O5-related structure, Zr0.10Ta0.90O2.45, was synthesized through a solid-state reaction using Ta2O5 and ZrO2 powders, followed by a 1700 °C heat treatment. The structure was determined to have a C-centered orthorhombic symmetry [a = 6.3717(2) Å, b = 10.8003(4) Å, c = 3.87058(12) Å], and is denoted as L′-Ta2O5. The possible space groups are C222, Cmm2, C2mm, or Cm2m. The L′-Ta2O5-type Zr0.10Ta0.90O2.45 has a strong second-harmonic generation signal and higher dielectric constant of 55, compared to conventional L-Ta2O5-related structures. High-temperature x-ray diffraction shows the phase transition to the L″-Ta2O5 phase with a pseudo-hexagonal structure around 400 K. The temperature dependence of the dielectric constant reveals that the phase has a maximum value of 60, which is attributed to the phase transition. Zr0.10Ta0.90O2.45 is a potential candidate for application in complementary metal–oxide–semiconductor-compatible devices using noncentrosymmetric materials.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.