2014 Fiscal Year Final Research Report
Enhanced Faraday effect of magneto-semiconductor nanoparticles with inner and out specific interactions
| Project/Area Number |
23350057
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
FUSHIMI Koji 北海道大学, 大学院工学研究院 (20271645)
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Keywords | 半導体 / ナノ粒子 / 希土類 / 光磁気 |
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| Outline of Final Research Achievements |
EuS nanocrystals containing paramagnetic Mn(II), Co(II), or Fe(II) ions have been prepared as advanced semiconductor materials with effective optical rotation under a magnetic field, Faraday rotation. Enhanced Faraday rotations of the EuS:M nanocrystals were observed around 550 nm, and their enhanced spin polarization was estimated using electron paramagnetic resonance (EPR) measurements.
Thin films composed of EuS nano particle aggregates on a glass electrode exhibited large magneto optical efficiency and a wide energy gap. The Verdet constant of the thin film was approximately 10 times larger than that of previously reported EuS nanoparticles. Remarkable magneto-optical properties of EuS nanocrystals linked with gold (EuS-Au nanosystem) have been demonstrated. The Faraday rotation angle of the EuS-Au nanosystem is dependent on the Au particle size and interparticle distance between EuS and Au nanocrystals. Enhancement of the Faraday rotation of EuS-Au nanosystems was observed.
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| Free Research Field |
光化学
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