| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
The purpose of the work is to establish the fabrication method of high-quality ferromagnetic iron nitride nano-dots, and to control their electronic and magnetic properties. We have investigated structural properties of nano-dots by scanning tunneling microscopy (STM) and found that the strict control of the annealing temperature is crucial to fabricate defect free nano-dots on the atomic scale. X-ray adsorption spectroscopy/X-ray magnetic circular dichroism (XAS/XMCD) measurements have been performed to study electronic and magnetic properties of nano-dots. We have revealed that the magnetic moments and magnetic anisotropy of nano-dots, which are important to understand the magnetization dynamics, strongly rely on the density of the atomic defects. Furthermore, we have shown that the above magnetic properties of nano-dots can be tuned by the magnetic coupling with magnetic materials.
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