Mbar-pressure phase stability and electronic structure of late transition metal nitride with single-bonded nitrogens

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289219
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Nagoya University
• Principal Investigator: Hasegawa Masashi 名古屋大学, 工学(系)研究科(研究院), 教授 (20218457)
• Co-Investigator(Kenkyū-buntansha): Niwa Ken 名古屋大学, 大学院工学研究科, 助教 (40509030) ; Soda Kazuo 名古屋大学, 大学院工学研究科, 教授 (70154705) ; Kikegawa Kakumi 高エネルギー加速器研究機構, 物質構造科学研究所, 准教授 (70195220)
• Co-Investigator(Renkei-kenkyūsha): Yagi Takehiko 愛媛大学, 地球深部ダイナミクス研究センター, 教授 (20126189)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 金属窒化物

Outline of Final Research Achievements

The system and technique for the synthesis and in-situ measurements in high pressures have been developed. They have been established to synthesize late transition metal nitrides with single-bonded nitrogens. They have also done to determine their phase stability and diagrams. We have tried synthesizing systematically various kinds of late transition metal nitrides using one chemical reaction route, i.e. the direct nitriding reaction. We have successfully synthesized many late transition metal nitrides and also discover novel ones. We have identified their phases by in-situ measurements and determined their phase stability. We have also developed and established the technique for measuring precise spectrum of the electronic structure although they are extremely tiny samples. We have investigated and discussed and their bonding state, crystal structure and electronic structure systematically and clarified the mechanism of their phase stability.

Free Research Field

超高圧物質科学