Investigateion of electronic functions of transition metal oxynitrides

• Project/Area Number: 24760005
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied materials science/Crystal engineering
• Research Institution: The University of Tokyo
• Principal Investigator: HIROSE Yasushi 東京大学, 理学(系)研究科(研究院), 助教 (50399557)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 酸窒化物 / 固体化学 / 薄膜 / 強誘電体 / 半導体 / 強磁性体 / エピタキシャル薄膜 / エレクトロニクス / エピタキシャル成長 / イオンビーム分析 / 複アニオン化合物

Research Abstract

High quality crystals of transition metal oxynitrides were synthesized in epitaxial thin film forms by nitrogen-plasma assisted pulsed laser deposition. As a result, (1) we found that perovskite SrTaO2N thin film grown under compressive epitaxial strain consisted of small ferroelectric domains and relaxor ferroelectric-like matrix region. DFT calculation suggested that these properties are related with trans- and cis- arrangement of oxygen and nitrogen in TaX6 octahedra, respectively. (2) We controlled the electrical conductivity of SrTaO2N and anatase TaON thin films from insulator to degenerated semiconductor by introducing anion vacancies as electron donor. (3) We succeeded in synthesizing ferromagnetic La0.75Sr0.25MnO3-xNx by solid phase epitaxy method with higher Curie temperature than than the oxide thin film. These results indicated that transition metal oxynitrides are a promissing materials for electronic or magnetic application.

Research Products

• [Journal Article] Heteroepitaxial Growth of Perovskite CaTaO_2N Thin Films by Nitrogen Plasma-Assisted Pulsed Laser Deposition (2014)
  • Author(s): D. Oka, Y. Hirose, T. Fukumura & T. Hasegawa
  • Journal Title: Crystal Growth & Design Volume: 14 Issue: 1 Pages: 87-90
  • DOI: 10.1021/cg401176j
  • Peer Reviewed
• [Journal Article] High-Mobility Electron Conduction in Oxynitride : Anatase TaON (2013)
  • Author(s): A. Suzuki, Y. Hirose, D. Oka, S. Nakao, T. ukumura, S. Ishii, K. Sasa, H. Matsuzaki, & T. Hasegawa
  • Journal Title: Chemistry of Materials Volume: 26 Issue: 2 Pages: 976-981
  • DOI: 10.1021/cm402720d
  • Peer Reviewed
• [Presentation] (2014)
  • Author(s): 岡, 他
  • Organizer: 第61回応用物理学会春季学術講演会
  • Place of Presentation: 青山学院大学
  • Year and Date: 2014-03-18
• [Presentation] Nb系ペロブスカイト型酸窒化物薄膜の電気輸送特性 (2014)
  • Author(s): 岡大地，廣瀬靖，中尾祥一郎，福村知昭，長谷川哲也
  • Organizer: 第61回応用物理学会春季学術講演会
  • Place of Presentation: 青山学院大学相模原キャンパス(神奈川県)
• [Presentation] (2013)
  • Author(s): 鈴木, 他
  • Organizer: 第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学
  • Year and Date: 2013-09-17
• [Presentation] (2013)
  • Author(s): A. Suzuki, et al.
  • Organizer: E-MRS 2013 Spring meeting
  • Place of Presentation: Strasbour
  • Year and Date: 2013-05-29
• [Presentation] (2013)
  • Author(s): D. Oka, et al.
  • Organizer: E-MRS 2013 Spring meeting
  • Place of Presentation: Strasbourg
  • Year and Date: 2013-05-27
• [Presentation] (2013)
  • Author(s): A. Suzuki, et al
  • Organizer: 8th International Symposium on Transparent Oxide and Related Materials for Electronics and Optics
  • Year and Date: 2013-05-14
• [Presentation] (2013)
  • Author(s): D. Oka, et al.
  • Organizer: APS March Meeting
  • Place of Presentation: Baltimore
  • Year and Date: 2013-03-19
• [Presentation] A Novel High Mobility Oxynitride Semiconductor: Anatase TaON Epitaxial Thin Film (2013)
  • Author(s): Atsushi Suzuki, Yasushi Hirose, Daichi Oka, Shoichiro Nakao, Hiroyuki Matsuzaki, Katsuyuki Fukutani, Satoshi Ishii, Kimikazu Sasa, Daiichiro Sekiba, Tomoteru Fukumura, and Tetsuya Hasegawa
  • Organizer: 8th International Symposium on Transparent Oxide and Related Materials for Electronics and Optics
  • Place of Presentation: International Conference Center, Waseda University, Tokyo, Japan
• [Presentation] Dielectric Properties of d0 Perovskite Oxynitride ATaO2 N Epitaxial Thin Films (2013)
  • Author(s): Daichi Oka, Yasushi Hirose, Hideyuki Kamisaka, Tomoteru Fukumura, Seiji Ito, Akira Morita, Hiroyuki Matsuzaki, Katsuyuki Fukutani, Satoshi Ishii, Kimikazu Sasa, Daiichiro Sekiba, Tetsuya Hasegawa
  • Organizer: E-MRS 2013 SPRING MEETING
  • Place of Presentation: Congress Center - Strasbourg, France
• [Presentation] Optical and electrical transport properties of anatase TaON epitaxial thin film (2013)
  • Author(s): A. Suzuki, Y. Hirose, D. Oka, S. Nakao, H. Matsuzaki, K. Fukutani, S. Ishii, K. Sasa, D. Sekiba, T. Fukumura, T. Hasegawa
  • Organizer: E-MRS 2013 SPRING MEETING
  • Place of Presentation: Congress Center - Strasbourg, France
• [Presentation] アナターゼ型TixTa1-xO1+yN1-z薄膜のエピタキシャル成長 (2013)
  • Author(s): 鈴木温，廣瀬靖，岡大地，中尾祥一郎，松崎浩之，福谷克之，石井聡，笹公和，関場大一郎，福村知昭，長谷川哲也
  • Organizer: 第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学京田辺キャンパス(京都府)
• [Presentation] Dielectric properties of perovskite oxynitride epitaxial thin films (2013)
  • Author(s): D. Oka, Y. Hirose, H. Kamisaka, T. Fukumura, S. Ito, A. Morita, H. Matsuzaki, K. Fukutani, S. Ishii, K. Sasa, D. Sekiba and T. Hasegawa
  • Organizer: APS March Meeting, 2013
  • Place of Presentation: Baltimore, Maryland
• [Presentation] (2012)
  • Author(s): 岡, 他
  • Organizer: APS March Meeting
  • Place of Presentation: 名古屋大学
  • Year and Date: 2012-09-19
• [Presentation] (2012)
  • Author(s): 鈴木, 他
  • Organizer: 日本セラミックス協会第25回秋季シンポジウム
  • Place of Presentation: 名古屋大学
  • Year and Date: 2012-09-19
• [Presentation] (2012)
  • Author(s): 岡, 他
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2012-09-14
• [Presentation] (2012)
  • Author(s): 鈴木, 他
  • Organizer: 012年秋季第73回応用物理学会学術講演会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2012-09-13
• [Presentation] (2012)
  • Author(s): Y. Hirose, et al.
  • Organizer: International Conference of Young Researchers on Advanced Materials
  • Place of Presentation: Singapore
  • Year and Date: 2012-07-06
  • Invited
• [Presentation] Ferroelectricity in Epitaxial thin film of Perovskite Oxynitride SrTaO2N (2012)
  • Author(s): Yasushi Hirose, Daichi Oka, Tetsuya Hasegawa
  • Organizer: International Conference of Young Researchers on Advanced Materials
  • Place of Presentation: Singapore
  • Invited
• [Presentation] ペロブスカイト型酸窒化物ATaO2N (A = Sr, Ca)エピタキシャル薄膜の誘電特性 (2012)
  • Author(s): 岡 大地，廣瀬 靖，伊藤誠二，森田 明，松崎浩之，福谷克之，石井 聡，笹 公和，関場大一郎，長谷川哲也
  • Organizer: 2012年秋季 第73回応用物理学会学術講演会
  • Place of Presentation: 愛媛大学城北地区・松山大学文京キャンパス
• [Presentation] アナターゼ型TaONエピタキシャル薄膜の物理特性II (2012)
  • Author(s): 鈴木 温，廣瀬 靖，岡 大地，中尾祥一郎，松崎浩之，福谷克之，石井 聡，笹 公和，関場大一郎，福村知昭，長谷川哲也
  • Organizer: 2012年秋季 第73回応用物理学会学術講演会
  • Place of Presentation: 愛媛大学城北地区・松山大学文京キャンパス
• [Presentation] ペロブスカイト型酸窒化物エピタキシャル薄膜の誘電特性 (2012)
  • Author(s): 岡 大地、廣瀬 靖、神坂 英幸、長谷川哲也、伊藤誠二、森田明、松崎浩之、福谷克之、石井聡、笹公和、関場大一郎
  • Organizer: 日本セラミックス協会 第25回秋季シンポジウム
  • Place of Presentation: 名古屋大学
• [Presentation] アナターゼ型TaON エピタキシャル薄膜の物理特性 (2012)
  • Author(s): 鈴木 温、廣瀬 靖、岡 大地、福村 知昭、長谷川哲也、松崎浩之、福谷克之、石井聡、笹公和、関場大一郎
  • Organizer: 日本セラミックス協会 第25回秋季シンポジウム
  • Place of Presentation: 名古屋大学
• [Remarks] 東京大学大学院理学系研究科 プレスリリース
  • URL: http://www.s.u-tokyo.ac.jp/ja/press/2013/50.html
• [Patent(Industrial Property Rights)] 導電体基板の製造方法、導電体基板、発光素子、電子機器、光電変換素子及び太陽電池パネル (2013)
  • Inventor(s): 廣瀬靖、長谷川哲也、鈴木温
  • Industrial Property Rights Holder: 公益財団法人神奈川科学技術アカデミー
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2013-036448
  • Filing Date: 2013-02-26