Y. Matsumoto
Tokyo Institute of Technology
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Featured researches published by Y. Matsumoto.
Applied Surface Science | 2004
R. Takahashi; H. Kubota; T. Tanigawa; Makoto Murakami; Yukio Yamamoto; Y. Matsumoto; Hideomi Koinuma
Abstract We report on the computer-aided design of a novel mask for the addressable ternary phase diagram to serve a quick screening of multi-component functional materials. Masking patterns were optimized to make a triangular ternary diagram with each composition changed from 0 to 100% by simulating the deposition process under the condition of synchronous control of the mask motion, target exchange, and laser pulses. Fabrication of a ternary M0.01Y1.99O3 (M=Eu, Tm, Tb) phosphor material demonstrates of the direct mapping relationship between the film composition and its cathode luminescence (CL) property.
Measurement Science and Technology | 2005
R. Takahashi; Y. Matsumoto; Hideomi Koinuma
A simple rotational shadow masking system has been designed by computer simulation for application to the fabrication of a ternary composition spread material library. A mask plate is stencilled off a right triangle pattern and a trapezoid pattern. This can define the thickness gradient of films deposited from three different sources along the axes between the tops and the mid-points of bottom lines of a triangle on a substrate surface. Optimizing the angles of the triangle and trapezoid patterns and regulating the rates of mask moving, the computer simulation predicts that the film thickness of each component varies linearly from one mono-layer at the top to zero at the bottom. This process enables the construction of a ternary phase diagram by repeating the film deposition sequence. This prediction has been mathematically derived in this study.
MRS Proceedings | 2003
R. Takahashi; T. Tanigawa; Yukio Yamamoto; Yoshiyuki Yonezawa; Y. Matsumoto; Hideomi Koinuma
We propose a new concept and method for high throughput screening of flux materials used in the bulk single crystal growth. The concept of our tri-phase epitaxy has been generalized as the flux-mediated epitaxy with the aid of quick optimization of flux materials in the combinatorial thin-film technology. Here, we report on the successful discovery of a new flux composition of Bi-Ti-Cu-O for the growth of high-quality Bi 4 Ti 3 O 12 bulk crystal and thin film.
Journal of Physical Chemistry B | 2005
Ryuhei Nakamura; Naomichi Ohashi; Akihito Imanishi; Takeo Osawa; Y. Matsumoto; Hideomi Koinuma; Yoshihiro Nakato
ACS Combinatorial Science | 2004
R. Takahashi; H. Kubota; Makoto Murakami; Yukio Yamamoto; Y. Matsumoto; Hideomi Koinuma
Applied Surface Science | 2004
Yuichi Yamamoto; Y. Matsumoto; Hideomi Koinuma
Mrs Bulletin | 2003
Y. Matsumoto; Hideomi Koinuma; Tetsuya Hasegawa; Ichiro Takeuchi; Frank Tsui; Young K. Yoo
Advanced Functional Materials | 2006
R. Takahashi; Yoshiyuki Yonezawa; Makoto Ohtani; Masashi Kawasaki; Kiyomi Nakajima; Toyohiro Chikyow; Hideomi Koinuma; Y. Matsumoto
Applied Surface Science | 2004
Yukio Yamamoto; R. Takahashi; Y. Matsumoto; Toyohiro Chikyow; Hideomi Koinuma
Applied Surface Science | 2004
Makoto Murakami; Y. Matsumoto; M. Nagano; Tetsuya Hasegawa; Masashi Kawasaki; Hideomi Koinuma