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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
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プラスティック・フェーズ・トランジションによって誘発される最も等価な極化方向を持つ分子・フェロエレクトリック
Heng-Yun Ye1, Jia-Zhen Ge1, Yuan-Yuan Tang1
1Ordered Matter Science Research Center, Southeast University , Nanjing 211189, People's Republic of China.
Journal of the American Chemical Society
|September 30, 2016
まとめ
研究者らは新種の分子イオン性鉄電性物質である テトラエチルアモニアムパークロレートを発見しました この材料は12の等価な鉄電気軸を備えており,最もよく知られているもので,優れたポリ結晶鉄電気アプリケーションを可能にします.
科学分野:
- 材料科学
- 固体物理学
- クリスタルグラフィー
背景:
- フェロ電気材料は様々な用途で重要であり,しばしばポリクリスタルセラミックとして利用されます.
- 多軸電鉄は,複数の等価な偏振方向を有し,多結晶のアプリケーションに好ましい.
- BaTiO3のような既存のセラミック・フェロエレクトリックは,典型的には3つまたはそれ以下に相当するフェロエレクトリック軸を有する.
研究 の 目的:
- これまでにない数の等価な電鉄軸を持つ新しい分子イオン電鉄材料を導入する.
- 先進的なポリクリスタリン・フェロ電気ケラミクスを作るためのこの材料の可能性を調査する.
主な方法:
- テトラエチルアモニウムパークロレートの合成と特徴付け
- 結晶構造と相変化の調査
- ポリクリスタルの形式での鉄電特性評価
主要な成果:
- テトラエチルアモニウムパークロラートは,12の等価フェロエレクトリックを持つ分子イオンフェロエレクトリックとして特定され,すべての既知のフェロエレクトリックを上回る.
- 軸の数が多いのは,高度に対称な立方体結晶システムにつながるプラスチックの相変化によるものである.
- この材料は,ポリクリスタルフィルムで完璧なマクロ電気性を達成する能力を示した.
結論:
- テトラエチルアモニウムパークロラートは,多軸鉄電性材料の重要な進歩を表しています.
- 12つの等価軸を持つユニークな構造は,高性能のポリクリスタリンフェロ電気陶器の設計に新しい可能性を提供します.
- この発見は,ポリクリスタルの用途に合わせた新しい多軸鉄電構造の道を開く.
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