Creation of Fe-N Nano-Magnet with Giant Magnetic Moment

• Project/Area Number: 20860008
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Electronic materials/Electric materials
• Research Institution: Tohoku University
• Principal Investigator: OGATA Yasunobu Tohoku University, 大学院・工学研究科, 教育研究支援者 (40509717)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,289,000 (Direct Cost: ¥2,530,000、Indirect Cost: ¥759,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥1,729,000 (Direct Cost: ¥1,330,000、Indirect Cost: ¥399,000)
• Keywords: 磁性ナノ粒子 / 窒化鉄 / 永久磁石

Research Abstract

The fabrication process of Fe-N magnetic particles was investigated in both direct and indirect synthesis method for the purpose of realizing Fe-N compound(Fe_<16>N_2) based permanent magnets. In the direct synthesis method, Fe_3N and Fe_4N nano particles whose average particle size is about 10nm were successfully synthesized by the decomposition of Fe(CO)_5 in NH_3 atmosphere. In the indirect method, the condition in which Fe_<16>N_2 phase can be formed was found out in the process that Fe_2O_3 powder is reduced in H_2, and successively exposed in NH_3.