Hokkaido University · Materials Science
Professor Yuichi Kamiya's research lab specializes in the structural and chemical characterization of advanced materials, particularly diamond and related semiconductors, using advanced x-ray techniques such as diffraction and absorption topography. The lab focuses on understanding the growth mechanisms, defect structures, and impurity distributions in synthetic and natural diamonds, with particular attention to fibrous growth textures and their implications for material properties. Their work bridges materials science and solid-state physics, contributing to the development of high-performance materials for industrial and electronic applications. The lab also explores the role of trace elements and local crystallographic variations in influencing material behavior at the microscale.
Figures are computed from collected data and may differ slightly.
Abstract A typical coated diamond has been examined by x-ray diffraction and absorption topography. At the commencement of the coat an abrupt change to fibrous, radial growth occurs. This radial mode of growth gives rise to the general spherical habit of thickly coated diamonds. In the specimen studied the range of misorientation in the fibrous coat was 0·43° about the fibre axis and 0·25° about a normal to the fibre axis. Fibre diameters ranged up to some tens of microns. X-ray absorption contr
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