2012 Fiscal Year Final Research Report
Fabrication of Ferrite Nanodots by using Self-Assembled Nanostructural Underlayer and Their Application to Ultrahigh Density Magnetic Recording Media
| Project/Area Number |
23760280
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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 |
Electronic materials/Electric materials
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 電気 / 電子材料(半導体、誘電体、磁性体、超誘電体、有機物、絶縁体、超伝導体など) |
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| Research Abstract |
The fabrication of ferrite nanodots was studied without the use of conventional lithographic techniques and patterning masks. Self-assembled Au nanodots were formed via sputtering and used as the underlayer for the ferrite film. Subsequently, hexagonal ferrite, SrFe_12O_19, was sputtered on the Au nanodots, resulting in an SrFe_12O_19/Au sample. Self-assembled SrFe_12O_19nanodots were obtained. The morphology of the Au nanodot underlayer acted as a template for the SrFe_12O_19 film, such that the self-assembled SrFe_12O_19 nanodots were formed. In addition, the fabrication of the SrFe_12O_19film on the Au nanodots induced the down-sizing ofthe magnetic domain structures of SrFe_12O_19 to the nanoscale. Importantly, although the nanodots showed nanometric magnetic domains, a sufficient magnetization magnitude in the SrFe_12O_19nanodots was revealed.
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