| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2017: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
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| Outline of Final Research Achievements |
Vibration power generation is one of the promising energy harvesting technologies that can generate electrical power from ambient vibration. Vibration power generators using the inverse magnetostrictive effect have attracted a great deal of attention for application to electronic power sources for wireless devices. Recently, the superior vibration energy generation performance due to the stress-induced large magnetic flux change was demonstrated by generators using Fe-Ga alloy single crystals. In this study, the magnetic domain structure of Fe-Ga alloy single crystals was observed using a Kerr effect microscope under magnetic fields and tensile stress. As a result, characteristic change of the magnetic domain structure due to the inverse magnetostrictive effect was directly observed. The mechanism of stress-induced large magnetic flux change was successfully explained in connection with the inverse magnetostrictive effect.
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