| 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)
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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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