| Budget Amount *help |
¥22,880,000 (Direct Cost: ¥17,600,000、Indirect Cost: ¥5,280,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
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| Outline of Final Research Achievements |
By developing the Hybrid-Anvil-Cell(HAC) for polarized and unpolarized neutron diffraction experiment, we have studied the pressure-induced ferroelectric properties in some multiferroic materials. By multi-exstream condition (5 GPa, 5 T, 1.5 K) neutron diffraction experiment for multiferroic TbMnO3 on the cold neutron time-of-flight diffractometer WISH in ISIS, we found that the gigantic ferroelectric polarization induced by high pressure in TbMnO3 is induced by the collinear magnetic ordering through the exchange striction mechanism. We also have developed the complete nonmagnetic HAC with nonmagnetic sapphire and diamond composite (or WC) anvils for Spherical-Neutron-Polarimetry (SNP) analysis experiment. By using the cell, we have succeeded in the first SNP analysis for the multiferroic CuFeO2 at Institut Laue Langevin, and determined the complex noncollinear magnetic structures in the pressure-induced ferroelectric phases.
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