Enhanced Faraday effect of magneto-semiconductor nanoparticles with inner and out specific interactions
Project/Area Number |
23350057
|
Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Functional materials chemistry
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Research Institution | Hokkaido University |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
FUSHIMI Koji 北海道大学, 大学院工学研究院 (20271645)
|
Project Period (FY) |
2011-04-01 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
|
Budget Amount *help |
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2013: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
|
Keywords | 半導体 / ナノ粒子 / 希土類 / 光磁気 / ナノ結晶 / 磁気特性 / 機能材料 / 表面 |
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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Report
(4 results)
Research Products
(17 results)