Development of Hybrid Anvil Cell for polarized and unpolarized neutron diffraction experiment

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05433
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Quantum beam science
• Research Institution: National Institute for Materials Science
• Principal Investigator: Terada Noriki 国立研究開発法人物質・材料研究機構, 先端材料解析研究拠点, 主任研究員 (60442993)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: マルチフェロイクス / 中性子回折 / 高圧力

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.

Free Research Field

強相関系物理