Synthesis of Novel Oxynitride With Derivate Perovskite Structure

2016 年度 実施状況報告書

• 研究課題/領域番号: 16K17877
• 研究機関: 京都大学
• 研究代表者: タッセル セドリック 京都大学, 工学研究科, 准教授 (60597798)
• 研究期間 (年度): 2016-04-01 – 2018-03-31
• キーワード: Perovskite

研究実績の概要

During this first year we have prepared and investigated the structure as well as the properties of novel mixed oxide-nitride perovskite structures. We have reported the structure of ZnTaO2N , a novel LiNbO3 type of structure with the peculiarity of a disordered A site with Zn2+ cations. Unlike other LiNbO3 structures which cristallize in the non-centrosymmetric R3c space group, ZnTaO2N crystallizes in the R-3c space group which is centrosymmetric. The presence of the nitride anion in the structrue is important owing to the fact that oxides with Zn2+ at the A site are usually R3c. Substitution of the Zn site with Mn2+ shows that a 97% substitution is necessary to observe a second harmonic generation signal indicative of the R3c space group.

We have also investigated the preparation of novel B-site ordered oxynitrides perovskites containing magnetic cations using high pressure and high temperature synthesis. The ordering of the different cations and the crystal structures were studied using synchrotron and neutron diffraction. The magnetic properties of the oxynitride have also been studied at low temperature and showed different properties with structurally similar pure oxides. The role of the presence of the nitride anion in the structure has an impact on the magnetic properties.

現在までの達成度 (区分)

2: おおむね順調に進展している

理由

With the respect to the proposed plan, we have prepared novel structure and investigated their structural and magnetic properties. The report of double perovskite structures is now on the way.

今後の研究の推進方策

We are planning to synthesize novel double perovskites structures using high pressure synthesis along the year. We will investigate the impact of the oxide and nitride ions. The anionic content of the different structure should have an important impact on the magnetic properties and absorption properties of the different structures.

次年度使用額が生じた理由

The amount that was not used for the first year because we had enough for purchasing the required items for our research.

次年度使用額の使用計画

We will purchase high pressure cells necessary for high pressure synthesis.

研究成果

• [雑誌論文] ZnTaO2N: Stabilized High-Temperature LiNbO3-type Structure (2016)
  • 著者名/発表者名: Yoshinori Kuno, Cedric Tassel, Koji Fujita, Dmitry Batuk, Artem M. Abakumov, Kazuki Shitara, Akihide Kuwabara, Hiroki Moriwake, Daichi Watabe, Clemens Ritter, Craig M. Brown, Takafumi Yamamoto, Fumitaka Takeiri, Ryu Abe, Yoji Kobayashi, Katsuhisa Tanaka, and Hiroshi Kageyama
  • 雑誌名: Journal of The American Chemical Society 巻: 138 ページ: 15950-15955
  • DOI: 10.1021/jacs.6b08635
  • 査読あり / 国際共著 / 謝辞記載あり
• [学会発表] Cedric Tassel, Yoshinori Kuno, Koji Fujita, Dmitry Batuk, Artem M. Abakumov, Kazuki Shitara, Akihide Kuwabara, Hiroki Moriwake, Daichi Watabe, Clemens Ritter, Craig M. Brown, Takafumi Yamamoto, Fumitaka Takeiri, Ryu Abe, Yoji Kobayashi, Katsuhisa Tanaka, and Hiroshi Kageyama (2016)
  • 著者名/発表者名: A Novel Oxynitride Perovskite with a High-Temperature-type LiNbO3 Structure
  • 学会等名: 日本セラミックス協会 第２９回秋シンポジウム
  • 発表場所: 広島大学
  • 年月日: 2016-09-07 – 2016-09-07