Reusable platform for physical property measurements under extreme conditions

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K22420
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0302:Electrical and electronic engineering and related fields
• Research Institution: National Institute for Materials Science
• Principal Investigator: MATSUMOTO Ryo 国立研究開発法人物質・材料研究機構, 若手国際研究センター, ICYS研究員 (10883960)
• Project Period (FY): 2020-09-11 – 2022-03-31
• Keywords: 超伝導 / 高圧力 / ダイヤモンド

Outline of Final Research Achievements

In this study, we have developed a materials synthesis platform that can generate high-temperature and high-pressure environments and measure the physical properties of samples under the extreme conditions. As a progress for two years, the conductive boron-doped diamond thin films were fabricated on the diamond anvil for generating high pressure as a heater, thermometer, and electrodes for resistivity measurements. The diamond components showed no degradation even after the high-temperature and high-pressure experiments. The pressure and temperature that can be generated have been improved to about 50 GPa and 1000°C, respectively. Using this platform, a new superconducting sulfide was synthesized.

Free Research Field

電気材料

Academic Significance and Societal Importance of the Research Achievements

温度と圧力は機能性材料の物性を決定する最も基本的かつ制御可能なパラメータである。本研究で構築したプラットフォームではこれらを簡便に制御しながら、その場で試料の結晶構造や電気抵抗を分析できるため、今後の様々な材料開発に貢献できる。特に近年注目されている水素化物高温超伝導体の探索では高温高圧合成や物性測定の難易度の高さがボトルネックであったため、今後の高温超伝導体探索の高効率化に貢献できたと考えている。