Observation and understanding the dielectric respond of material hierarchy with using the second harmonic generation microscope

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740195
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: Chiba University
• Principal Investigator: YOKOTA Hiroko 千葉大学, 理学(系)研究科(研究院), 助教 (50608742)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 誘電体 / 光第2高調波 / ドメイン / 階層構造

Outline of Final Research Achievements

Under this research grant, we carried out the experiment in order to clarify the relationship between the structure and the external stimulus.
Using the second harmonic generation microscope, we confirmed that he polar nature of the ferroelastic twin boundaries in CaTiO3. Ferroelastic materials is fundamentally non polar and does not produce SH wave. However, the symmetry around the domain boundary is lower and it becomes polar. This idea also can be applied to antiphase boundary in antiferroelectrics. Since the width of domain boudary in ferroelastics and antiferroelectrics is much thinner than that of ferromagnetics, it is very attractive for the memory device application.

Free Research Field

凝縮系物理