| Presentation | 2012-12-14 Observation of magnetic domain pattern and M-H curve in perpendicular magnetic anisotropy thin film and using polarization microscope with high-power LED light source Takayoshi IWASAKI, Kensho OKAMOTO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, perpendicular magnetization films, which has a uniaxial magnetic anisotropy vertical to the film plane, are used as recording media of hard-disk drive (HDD) in computer system. Magnetic domain pattern of perpendicular magnetization film can be observed by a polarization microscope. However conventional halogen lamp and high-pressure mercury lamp used in the microscope system are not stable light source, since it has problems such as light fluctuation, electromagnetic noise and lamp life. On the other hand, the high-power white LED which has made great progress lately is a stable light source, and also the light intensity can be electrically modulated by sinusoidal waveform mode. From such a point of view, we introduced a white LED to our microscope system instead of halogen lamp and observed the magnetic domain pattern of a magnetic garnet film with perpendicular magnetic anisotropy. Also, we developed a experimental system to measure the magnetization curve using the magnetic Faraday effect. This paper describes our method and the experimental results. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | white LED / perpendicular magnetic anisotropy film / magnetic domain / M-H curve / polarizing microscope / Magnetic Faraday effect |
| Paper # | MR2012-40 |
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| Conference Information | |
| Committee | MR |
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| Conference Date | 2012/12/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Magnetic Recording (MR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Observation of magnetic domain pattern and M-H curve in perpendicular magnetic anisotropy thin film and using polarization microscope with high-power LED light source |
| Sub Title (in English) | |
| Keyword(1) | white LED |
| Keyword(2) | perpendicular magnetic anisotropy film |
| Keyword(3) | magnetic domain |
| Keyword(4) | M-H curve |
| Keyword(5) | polarizing microscope |
| Keyword(6) | Magnetic Faraday effect |
| 1st Author's Name | Takayoshi IWASAKI |
| 1st Author's Affiliation | School of Engineering Kagawa University() |
| 2nd Author's Name | Kensho OKAMOTO |
| 2nd Author's Affiliation | School of Engineering Kagawa University |
| Date | 2012-12-14 |
| Paper # | MR2012-40 |
| Volume (vol) | vol.112 |
| Number (no) | 354 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |