Direct observation of dynamics on nanoscale magnets: Development of SQUID magnetometers

• Project/Area Number: 20684015
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: University of Hyogo
• Principal Investigator: YAMAGUCHI Akira University of Hyogo, 大学院・物質理学研究科, 准教授 (10302639)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥25,220,000 (Direct Cost: ¥19,400,000、Indirect Cost: ¥5,820,000); Fiscal Year 2009: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000); Fiscal Year 2008: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
• Keywords: 磁性 / 超伝導材料・素子 / マイクロ・ナノデバイス / 低温物性 / 物性実験

Research Abstract

We have developed of micro superconducting quantum interference device (micro-SQUID) magnetometers for investigation of quantum effect in magnetization reversal of micro or nm-sized magnetic materials. Both high- and low-temperature superconductor (HTS and LTS) based micro-SQUID magnetometers were fabricated and a three-dimensional magnetic coil system was constructed for this purpose. Magnetization measurements of a micro-crystal of several molecular-based magnets were carried out.

Research Products

• [Journal Article] Development of Micro-SQUID Magnetometers for Investigation of Quantum Tunneling of Magnetization in Nanometer-Size Magnetic Materials (2010)
  • Author(s): A. Yamaguchi, K. Takeda, T. Matsumoto, G. Motoyama, H. Kashiwaya, S. Kuriki, S. Kashiwaya, S. Ohkoshi, A. Sumiyama
  • Journal Title: Journal of Low Temperature Physics 158 Pages: 704-709
  • Peer Reviewed
• [Journal Article] Absolute quantization of magnetization of individual micron-sized magnets using a high-temperature superconductor micro-SQUID magnetometer (2010)
  • Author(s): K. Takeda, H. Tokoro, A. Yamaguchi, S. Ohkoshi
  • Journal Title: Supercond. Sci. Technol. 23
  • Peer Reviewed
• [Journal Article] Development of Micro-SQUID Magnetometers for Investigation of Quantum Tunneling of Magnetization in Nanometer-Size Magnetic Materials (2010)
  • Author(s): Ahra Yamaguchi(第1著者), 他
  • Journal Title: Journal of Low Temperature Physics 158 Pages: 704-709
  • Peer Reviewed
• [Journal Article] High temperature superconductor micro-SQUID magnetometer for molecular-based magnet (2009)
  • Author(s): K. Takeda, H. Tokoro, F. Hakoe, A. Yamaguchi, H. Mori, H. Ishimoto, T. Nakamura, S. Kuriki, S. Ohkoshi
  • Journal Title: Polyhedron 28 Pages: 1746-1749
  • Peer Reviewed
• [Journal Article] High temperature superconductor microsuperconducting- quantum-interference -device magnetometer for magnetization measurement of a microscale magnet (2008)
  • Author(s): K. Takeda, H. Mori, A. Yamaguchi, H. Ishimoto, T. Nakamura, S. Kuriki, T. Hozumi, S. Ohkoshi
  • Journal Title: Review of Scientific Instruments 79,033909 Pages: 1-7
  • Peer Reviewed
• [Journal Article] High temperature superconductor micro-superconducting-quant um-interference-device magnetometer for magnetization measu rement of a microscale magnet (2008)
  • Author(s): 武田啓司、森初果、山口明、他6名
  • Journal Title: Review of Scientific Instruments 79, 033909 Pages: 1-7
  • Peer Reviewed
• [Presentation] 低温マイクロSQUID磁束計を使った分子性磁性体の測定 (2010)
  • Author(s): 谷礼王馬, 和田雅人, 山口明, 松本哲郎A, 武田啓司, 本山岳, 柏谷聡, 大越慎一, 住山昭彦
  • Organizer: 日本物理学会2010春季大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] 低温マイクロSQUID磁束計を使った分子腔磁性体の測定 (2010)
  • Author(s): 山口明(発表者), 他
  • Organizer: 日本物理学会2010春季大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] ナノスケール磁性体の磁化反転測定のためのμ-SQUID磁束計の開発 (2009)
  • Author(s): 山口明, 松本哲郎, 武田啓司, 本山岳, 柏谷聡, 大越慎一, 住山昭彦
  • Organizer: 日本物理学会2009秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-27
• [Presentation] μ-SQUIDによるRbMn[Fe(CN)6]の微小単結晶の磁化測定 (2009)
  • Author(s): 武田啓司, 所裕子, 山口明, 大越慎一
  • Organizer: 日本物理学会2009秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-27
• [Presentation] Development of Micro-SQUID Magnetometers for Investigation of Quantum Tunneling of Magnetization in Nanometer-Size Magnetic Materials (2009)
  • Author(s): A. Yamaguchi
  • Organizer: International Symposium on Quantum Fluids and Solids
  • Place of Presentation: 米国、ノースウエスタン大学
  • Year and Date: 2009-08-07
• [Presentation] 「温超伝導体マイクロSQUID磁束計によるRbMnLFe(CN)_6」の磁気ヒステリシス測定 (2009)
  • Author(s): 武田啓司
  • Organizer: 日本化学会大89回春季年会
  • Place of Presentation: 日本大学理工学部
  • Year and Date: 2009-03-29
• [Remarks]
  • URL: http://www.sci.u-hyogo.ac.jp/material/low_temp/yamaguchi/yamaguchi.html
• [Remarks]
  • URL: http://www.sci.u-hyogo.ac.jp/material/low_temp/yamaguchi/yamaguchi.html