| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Outline of Final Research Achievements |
To investigate formation mechanism of the seismic anisotropy in the Earth’s inner core, we conducted deformation experiments and thermal conductivity measurements on hcp-iron. Crystallographic-preferred orientation determined by the deformation experiments suggests predominance of basal slip in hcp-iron, and the strength of the calculated anisotropy is comparable to the inner core anisotropy. Thermal conductivity measurements revealed that the hcp-iron has a strong anisotropy where the thermal conductivity varies by a factor of 3-4 depending on crystallographic orientation. This strong anisotropy may enhance temperature heterogeneity in the inner core.
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