Order-disorder transformation and magnetic transformation of L1_0-type FePd alloy nanoparticles studied by transmission electron microscopy

• Project/Area Number: 19760459
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Physical properties of metals
• Research Institution: Tohoku University
• Principal Investigator: SATO Kazuhisa Tohoku University, 金属材料研究所, 助教 (70314424)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,670,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2007: ¥2,500,000 (Direct Cost: ¥2,500,000)
• Keywords: 微粒子 / クラスター / L1_0型規則構造 / FePdナノ粒子 / 規則不規則変態 / 粒径依存性 / 高分解能電子顕微鏡 / 球面収差補正 / HAADF-STEM / Zコントラスト / FePd / 合金ナノ粒子 / 磁気変態 / 透過電子顕微鏡法 / 電子回折 / サイズ効果

Research Abstract

硬質磁性FePdナノ粒子の規則不規則変態を透過電子顕微鏡法・電子回折法により詳細に調べた結果、相変態温度の粒径依存性、変態温度直上での短範囲規則構造、高温での不規則化過程、規則格子形成の臨界粒径と格子歪について新たな知見を得ることができた。これまで不明であったL1_0型規則合金ナノ粒子における規則不規則変態の粒径依存性を実験的に明らかにすることができた。

Research Products

• [Journal Article] Atomic structure imaging of L10-type FePd nanoparticles by spherical aberration corrected high-resolution transmission electron microscopy (2009)
  • Author(s): K. Sato, T. J. Konno, and Y. Hirotsu
  • Journal Title: Journal of Applied Physics 105(3)
  • Peer Reviewed
• [Journal Article] Intermetallic ordering and structure in Fe-Pd alloy nanoparticles (2009)
  • Author(s): K. Sato, J. G. Wen, J. M. Zuo
  • Journal Title: Journal of Applied Physics 105(9)
  • Peer Reviewed
• [Journal Article] Electron microscopy study of L10-FePtCu nanoparticles synthesized at 613 K (2009)
  • Author(s): Y. Hirotsu, H. W. Ryu, K. Sato, and M. Ishimaru
  • Journal Title: Journal of Microscopy (in press)
  • Peer Reviewed
• [Journal Article] Atomic structure imaging of L1_0-type FePd nanoparticles by spherical aberration corrected high-resolution transmission electron microscopy (2009)
  • Author(s): K. Sato, T. J. Konno, Y. Hirotsu
  • Journal Title: Journal of Applied Physics 105(3) Pages: 343081-5
  • NAID: 10026268014
  • Peer Reviewed
• [Journal Article] Electron Microscopy Study of L1_0-FePtCu nanoparticles synthesized at 613K (2009)
  • Author(s): Y. Hirotsu, H. W. Ryu, K. Sato, M. Ishimaru
  • Journal Title: Journal of Microscopy (印刷中)
  • Peer Reviewed
• [Journal Article] L10-type ordered structure of FePd nanoaprticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T. J. Konno, and Y. Hirotsu
  • Journal Title: Proceedings of the 14th European Microscopy Congress 2 Pages: 619-620
  • Peer Reviewed
• [Journal Article] L10型FePd規則合金ナノ粒子の長範囲規則度 (2008)
  • Author(s): 佐藤和久,弘津禎彦
  • Journal Title: 日本結晶学会誌 50(4) Pages: 262-268
  • Peer Reviewed
• [Journal Article] L1_0型FePd規則合金ナノ粒子の長範囲規則度 (2008)
  • Author(s): 佐藤和久、弘津禎彦
  • Journal Title: 日本結晶学会誌 50(4) Pages: 262-268
  • NAID: 10024283110
  • Peer Reviewed
• [Journal Article] L1_0-type ordered structure of FePd nanoparticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T. J. Konno, Y. Hirotsu
  • Journal Title: Proceedings of the 14^<th> European Microscopy Congress 2 Pages: 619-620
  • Peer Reviewed
• [Journal Article] Atomic structure of L1_0-FePd nanoparticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T.J. Konno, Y. Hirotsu
  • Journal Title: International Journal of Advanced Microscopy and Theoretical Calculations 1 Pages: 246-247
  • Peer Reviewed
• [Journal Article] High-resolution transmission electron microscopy analysis of L10 ordering in Fe/Pd thin layers (2007)
  • Author(s): A. Kovacs, K. Sato, and Y. Hirotsu
  • Journal Title: Journal of Applied Physics 102(12)
  • Peer Reviewed
• [Journal Article] High-resolution transmission electron microscopy analysis of L1_0 ordering Process in Fe/Pd thin layers (2007)
  • Author(s): A. Kovacs, K. Sato, Y. Hirotsu
  • Journal Title: Journal of Applied Physics 102
  • Peer Reviewed
• [Presentation] 走査透過電子顕微鏡によるFePdナノ粒子の極微構造及び立体形状観察 (2009)
  • Author(s): 佐藤和久,青柳健大,今野豊彦,弘津禎彦
  • Organizer: 日本金属学会2009年春期(第144回)大会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2009-03-30
• [Presentation] Ll_0 type ordered structure of FePd nanoparticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T. J. Konno, and Y. Hirotsu
  • Organizer: 14^<th> European Microscopy Congress
  • Place of Presentation: Aachen, Germany
  • Year and Date: 2008-09-04
• [Presentation] L1_0-type ordered structure of FePd nanoparticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T. J. Konno, Y. Hirotsu
  • Organizer: 14^<th> European Microscopy Congress
  • Place of Presentation: Aachen, Germany
  • Year and Date: 2008-09-04
• [Presentation] Determination of order parameter of single L1_0-FePd nanoparticles by nanobeam electron diffraction (2008)
  • Author(s): K. Sato and Y. Hirotsu
  • Organizer: XXI Congress of the International Union of Crystallography
  • Place of Presentation: 大阪国際会議場
  • Year and Date: 2008-08-26
• [Presentation] Determination of order parameter of single L1_0-FePd nanoparticle by nanobeam electron diffraction (2008)
  • Author(s): K. Sato, Y. Hirotsu
  • Organizer: XXI Congress of the International Union of Crystallography
  • Place of Presentation: 大阪国際会議場
  • Year and Date: 2008-08-26
• [Presentation] High-resolution TEM observation of L1_0 type FePd nanoparticles (2008)
  • Author(s): K. Sato, T. J. Konno, and Y. Hirotsu
  • Organizer: Microscopy and Microanalysis 2008
  • Place of Presentation: Albuquerque, New Mexico, USA
  • Year and Date: 2008-08-04
• [Presentation] High-resolution TEM observation of L1_0-type FePd nanoparticles (2008)
  • Author(s): K. Sato, T. J. Konno, Y. Hirots
  • Organizer: Microscopy and Microanalysis 2008
  • Place of Presentation: Albuquerque, NM, USA
  • Year and Date: 2008-08-04
• [Presentation] Atomic structure of L1_0-FePd nanoaprticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T. J. Konno, and Y. Hirotsu
  • Organizer: The 1^<st> International Symposium on Advanced Microscopy and Theoretical Calculations
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2008-06-30
• [Presentation] Atomic structure of L1_0-FePd nanoparticles studied by high-resolution transmission electron microscopy (2008)
  • Author(s): K. Sato, T. J. Konno, Y. Hirotsu
  • Organizer: The 1^<st> International Symposium on Advanced Microscopy and Theoretical Calculations
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2008-06-30
• [Presentation] 方位配向FePd合金ナノ粒子規則構造の高分解能電子顕微鏡観察 (2008)
  • Author(s): 佐藤和久,今野豊彦,弘津禎彦
  • Organizer: 日本顕微鏡学会第64回学術講演会
  • Place of Presentation: 国立京都国際会館
  • Year and Date: 2008-05-23
• [Presentation] L1_0型FePd規則合金ナノ粒子の極微構造観察 (2008)
  • Author(s): 佐藤和久,今野豊彦,弘津禎彦
  • Organizer: 日本金属学会2008年春期(第142回)大会
  • Place of Presentation: 武蔵工業大学
  • Year and Date: 2008-03-28
• [Presentation] L1_0 ordering and order-disorder transformation in Pd-Co-Fe magnetic nanoparticles (2007)
  • Author(s): A. Kovacs, K. Sato, and Y. Hirotsu
  • Organizer: 6^<th> International Conference on Fine Particle Magnetism
  • Place of Presentation: Rome, Italy
  • Year and Date: 2007-10-11
• [Presentation] L1_0 ordering and order-disorder transformation in Pd-Co-Fe magnetic nanoparticles (2007)
  • Author(s): A. Kovacs, K. Sato, Y. Hirotsu
  • Organizer: 6th Int'l Conf. on Fine Particle Magnetism (ICPFM)
  • Place of Presentation: Rome, Italy
  • Year and Date: 2007-10-11
• [Presentation] Fabrication of oriented hard-magnetic alloy nanoparticles and their characterization (2007)
  • Author(s): Y. Hirotsu, K. Sato, A. Kovacs, H. Naganuma, H. W. Ryu
  • Organizer: The 1^<st> International Symposium on Advanced Magnetic Materials and Applications
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2007-05-30
• [Presentation] Fabrication of oriented hard-magnetic alloy nanoparticles and their characterization (2007)
  • Author(s): Y. Hirotsu, K. Sato, A. Kovacs, H. Naganuma, H.W. Ryu
  • Organizer: The 1st Int'l Symposium on Advanced Magnetic Materials and Applications (ISAMMA)
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2007-05-30
• [Remarks]
  • URL: http://konno-lab.imr.tohoku.ac.jp/
• [Remarks]
  • URL: http://db.tohoku.ac.jp/whois/detail/60a015e70906fc5403093e8bed073170.html