Spin control in ferrite by organic molecules

• Project/Area Number: 24560845
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Nagaoka University of Technology
• Principal Investigator: SUEMATSU Hisayuki 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (30222045)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 多孔体 / 電気抵抗 / 磁性 / 有機物吸着 / フェライト / 超微粒子 / 薄膜 / ニッケルフェライト / 有機物吸脱着 / 磁化 / スピン / 磁性体 / 有機物 / 吸着 / 錯体重合

Outline of Final Research Achievements

Crystalline and porous NiFe2O4 fibers, bulks and thin films were developed to investigate their electronic and magnetic property changes upon organic molecule adsorption. In NiFe2O4 porous bulks, the amount of butyl acetate to induce an electric resistivity change more than one order of magnitude is 1200ul. In NiFe2O4 porous thin films, formic acid adsorption causes 18.4% of magnetization change. These electric and magnetic property changes are caused by a field effect from adsorpted molecules on NiFe2O4 grains to change the amount of carriers and the direction of spins.

Research Products

• [Journal Article] Variations in the Saturation Magnetization of Nanosized NiFe2O4 Particles on Adsorption of Carboxylic Acids (2014)
  • Author(s): R. Kurosawa, T. Suzuki, T. Nakayama, H. Suematsu, K. Niihara, S. Satokawa, Y. Yasukawa, and X. Liu
  • Journal Title: J. Asian Ceram. Soc. Volume: 2 Issue: 1 Pages: 41-43
  • DOI: 10.1016/j.jascer.2014.01.001
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis of ferromagnetic nickel ferrite nanofibers via electrospinning with iron acetate as an iron precursor (2012)
  • Author(s): J. Zhang
  • Journal Title: Metals and Materials International Volume: 18 Issue: 3 Pages: 505-508
  • DOI: 10.1007/s12540-012-3019-x
  • Peer Reviewed
• [Journal Article] Promotion of grain growth in NiFe2O4 by annealing with oleic acid (2012)
  • Author(s): R. Kurosawa
  • Journal Title: Current Applied Physics Volume: 12 Pages: S68-S70
  • DOI: 10.1016/j.cap.2012.02.022
  • Peer Reviewed
• [Presentation] Change in Magnetization of NiFe2O4 Porous Thin Film by Formic Acid Adsorption (2015)
  • Author(s): Ryo Arakawa, Tsuneo Suzuki, Tadachika Nakayama, Hisayuki Suematsu, and Koichi Niihara
  • Organizer: The 5th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies
  • Place of Presentation: Niigata
  • Year and Date: 2015-06-16 – 2015-06-19
• [Remarks] 極限エネルギー密度工学研究センター
  • URL: http://etigo.nagaokaut.ac.jp/
• [Remarks] 末松久幸のページ
  • URL: http://etigo.nagaokaut.ac.jp/suematsu/index.html