Study of defect in insulator material by using soft x-ray

• Project/Area Number: 23560034
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: SAGA Light Source, Kyushu Synchrotron Light Research Center
• Principal Investigator: KOBAYASHI EIICHI 公益財団法人佐賀県地域産業支援センター九州シンクロトロン光研究センター, ビームライングループ, 主任研究員 (80319376)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
• Keywords: 軟X線吸収分光 / 絶縁体 / 欠陥 / 軟Ｘ線吸収分光 / 表面

Research Abstract

Defect of Magnesium oxide (MgO) was studied by using near-edge X-ray absorption fine structure (NEXAFS). NEXAFS spectra for the O K-edge region of MgO thin film created defects by argon ion sputtering were broader than that of before sputtering because the amorphous layer is formed on the surface. The intensities of peaks in the NEXAFS spectra of MgO powder were changed by annealing in hydrogen atmosphere. These results indicate that the oxygen vacancies were induced by hydrogen reduction and the number of vacancies was dependent on the treatment temperature. NEXAFS spectra were measured while applying a voltage to the MgO and changed with near the breakdown voltage.

Research Products

• [Journal Article] Near-edge X-ray absorption fine structure spectroscopic study of the annealed metal oxide thin film (2014)
  • Author(s): E. Kobayashi, K. K. Bando and T. Okajima
  • Journal Title: UVSOR Activity Report 2013 Volume: UVSOR-41(in press)
• [Journal Article] Near-edge X-ray absorption fine structure spectroscopic study of the annealed metal oxide thin film (2014)
  • Author(s): E. Kobayashi, K. K. Bando, and T. Okajima
  • Journal Title: UVSOR Activity Report 2013 Volume: 41
• [Journal Article] Investigation of annealed magnesium oxide powder using near-edge X-ray absorption fine structure and X-ray photoelectron spectroscopies (2013)
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Journal Title: Proceedings of 9th International Symposium on Atomic Level Characterizations for New Materials and Devices'13 Pages: 530-531
• [Journal Article] (2013)
  • Author(s): E. Kobayashi, K. K. Bando and T. Okajima
  • Journal Title: UVSOR Activity Report 2012 Volume: UVSOR-40 Pages: 94-94
• [Journal Article] Defects in Metal Oxide Studied by X-ray Absorption Fine Structure Spectroscopy (2013)
  • Author(s): E. Kobayashi, K. K. Bando, and T. Okajima
  • Journal Title: UVSOR Activity Report 2012 Volume: 40 Pages: 94-94
• [Journal Article] Investigation of annealed magnesium oxide powder using near-edge X-ray absorption fine structure and X-ray photoelectron spectroscopies (2013)
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Journal Title: Proceedings of 9th International Symposium on Atomic Level Characterizations for New Materials and Devices ’13 Volume: - Pages: 530-531
• [Journal Article] 放射光軟X線を用いた軽元素の化学結合状態解析 (2011)
  • Author(s): 小林英一,岡島敏浩
  • Journal Title: まてりあ Volume: vol.50 Pages: 423-430
  • NAID: 10029693219
  • Peer Reviewed
• [Presentation] 水素還元処理した酸化マグネシウム微粒子表面の変化 (2014)
  • Author(s): 小林英一,阪東恭子,岡島敏浩
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2014-03-28
• [Presentation] 真空中で加熱した酸化マグネシウム薄膜の研究 (2014)
  • Author(s): 小林英一,岡島敏浩
  • Organizer: 第27回日本放射光学会年会
  • Place of Presentation: 広島国際会議場
  • Year and Date: 2014-01-11
• [Presentation] Investigation of the annealed magnesium oxide powder using near-edge X-ray absorption fine structure and X-ray photoelectron spectroscopies (2013)
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Organizer: 9th International Symposium on Atomic Level Characterizations for New Materials and Devices'13
  • Place of Presentation: Sheraton Kona, The Big Island, Hawaii
  • Year and Date: 2013-12-05
• [Presentation] 加熱処理による酸化マグネシウム微粒子表面の変化 (2013)
  • Author(s): 小林英一,岡島敏浩
  • Organizer: 第54回真空に関する連合講演会
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2013-11-26
• [Presentation] Near-edge X-ray Absorption Fine Structure Spectroscopy and X-ray Photoelectron Spectroscopy Study of The Annealed Magnesium Oxide Thin Film (2013)
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Organizer: 12th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures
  • Place of Presentation: Tsukuba International Congress Center, Tsukuba
  • Year and Date: 2013-11-07
• [Presentation] 軟X線吸収分光法と光電子分光法を用いた酸化マグネシウム微粒子の研究 (2013)
  • Author(s): 小林英一,岡島敏浩
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学常三島キャンパス
  • Year and Date: 2013-09-27
• [Presentation] 軟X線吸収分光法を用いた加熱処理した酸化マグネシウムの研究 (2013)
  • Author(s): 小林英一,岡島敏浩
  • Organizer: 第16回XAFS討論会
  • Place of Presentation: 東京大学理学部化学本館講堂
  • Year and Date: 2013-09-06
• [Presentation] イオンスパッタリングによる酸化マグネシウム薄膜表面の変化に関する研究 (2013)
  • Author(s): 小林英一,岡島敏浩
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-26
• [Presentation] 軟X線吸収分光法と光電子分光法による酸化マグネシウム薄膜表面の研究 (2012)
  • Author(s): 小林英一,岡島敏浩
  • Organizer: 第53回真空に関する連合講演会
  • Place of Presentation: 甲南大学ポートアイランドキャンパス
  • Year and Date: 2012-11-15
• [Presentation] NEXAFS分光法による酸化マグネシウムの表面とバルクの同時測定 (2012)
  • Author(s): 小林英一、岡島敏浩
  • Organizer: 日本物理学会 第67回年次大会
  • Place of Presentation: 関西学院大学
• [Presentation] Near-edge X-ray absorption fine structure spectroscopy in Magnesium Oxide (2011)
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Organizer: International Symposium on Surface Science - 6
  • Place of Presentation: Tower Hall Funabori
• [Presentation] 軟X線吸収分光法を用いた加熱処理した酸化マグネシウムの研究
  • Author(s): 小林英一，岡島敏浩
  • Organizer: 第16回XAFS討論会
  • Place of Presentation: 東京大学理学部化学本館講堂
• [Presentation] 軟X線吸収分光法と光電子分光法を用いた酸化マグネシウム微粒子の研究
  • Author(s): 小林英一，岡島敏浩
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学常三島キャンパス
• [Presentation] Near-edge X-ray Absorption Fine Structure Spectroscopy and X-ray Photoelectron Spectroscopy Study of The Annealed Magnesium Oxide Thin Film
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Organizer: 12th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures
  • Place of Presentation: Tsukuba International Congress Center
• [Presentation] 加熱処理による酸化マグネシウム微粒子表面の変化
  • Author(s): 小林英一，岡島敏浩
  • Organizer: 第54回真空に関する連合講演会
  • Place of Presentation: つくば国際会議場
• [Presentation] Investigation of the annealed magnesium oxide powder using near-edge X-ray absorption fine structure and X-ray photoelectron spectroscopies
  • Author(s): Eiichi Kobayashi and Toshihiro Okajima
  • Organizer: The 9th International Symposium on Atomic Level Characterizations for New Materials and Devices ’13
  • Place of Presentation: Sheraton Kona
• [Presentation] 真空中で加熱した酸化マグネシウム薄膜の研究
  • Author(s): 小林英一，岡島敏浩
  • Organizer: 第27回日本放射光学会年会
  • Place of Presentation: 広島国際会議場
• [Presentation] 水素還元処理した酸化マグネシウム微粒子表面の変化
  • Author(s): 小林英一，阪東恭子，岡島敏浩
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学湘南キャンパス
• [Presentation] 軟X線吸収分光法と光電子分光法による酸化マグネシウム薄膜表面の研究
  • Author(s): 小林 英一、岡島 敏浩
  • Organizer: 第53回真空に関する連合講演会
  • Place of Presentation: 甲南大学ポートアイランドキャンパス（兵庫県）
• [Presentation] イオンスパッタリングによる酸化マグネシウム薄膜表面の変化に関する研究
  • Author(s): 小林 英一、岡島 敏浩
  • Organizer: 日本物理学会 第68回年次大会
  • Place of Presentation: 広島大学（広島県）