2015 Fiscal Year Final Research Report
Direct observation of dynamic magnetization reversal in magnetic nano-dots using spin-polarized STM
| Project/Area Number |
26790004
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanostructural physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 走査トンネル顕微鏡 / 放射光 / ナノ構造 / 窒化鉄 |
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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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| Free Research Field |
ナノスケール磁性
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