| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2015: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Outline of Final Research Achievements |
Magneto-electric effect (ME) is phenomena coupling between the magnetic and electric properties in materials. The ME effect is one of the promising candidate to reverse the magnetization by electric field. In this research, we focus on a ME mechanism for a spiral spin structure which generates electric polarization of P∝ eij× ( Si × Sj) . By combining the two insulating ferromagnetic thin films with different magnetic preferential directions, an artificial 90-degree magnetic domain wall emerges at the interface of the two films, which can be expected to generate electric polarization. Since the induced electric polarity is simply dependent on the chirality of magnetic domain wall, the magnetization can be controlled by external electric field. We fabricated a bilayer system composed of two ferromagnetic insulators with different magnetic preferential directions and verified the ME effect in the bilayer system.
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