Development of time-resolved structure measurement technique to visualize momentary atomic motion and change in chemical bonding under applied electric field

2016 Fiscal Year Final Research Report

• Project/Area Number: 26286043
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Crystal engineering
• Research Institution: Hiroshima University
• Principal Investigator: Kuroiwa Yoshihiro 広島大学, 理学(系)研究科(研究院), 教授 (40225280)
• Co-Investigator(Kenkyū-buntansha): 森吉 千佳子 広島大学, 理学(系)研究科(研究院), 准教授 (00325143) ; 大沢 仁志 公益財団法人高輝度光科学研究センター, 利用研究促進部門, 研究員 (00443549)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 誘電体物性 / ペロブスカイト / X線回折 / 電場印加実験 / 時分割実験 / 結晶構造解析 / 放射光

Outline of Final Research Achievements

We have developed the time-resolved X-ray Diffraction experiment system by the pump-probe method with time resolution of 50 ps, in which the irradiation timing of synchrotron radiation pulse X-ray from the single bunch of electrons accumulated in the storage ring of SPring-8 is synchronized with the timing of the electric field applied to a sample by the X-ray chopper. We succeed in capturing the atomic motion in ferroelectric crystals associated with the polarization reversal and in a resonantly vibrating quartz crystal using the system. Novel lead-free piezoelectric ceramics with a huge lattice strain under applied electric field are found.

Free Research Field

構造物性