Papers by Author: Mineharu Tsukada

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Authors: Jeffrey S. Cross, M. Fujiki, Taku Sakai, Mineharu Tsukada, N. Kamehara
Authors: Y. Xuan, N. Wakiya, Kazuo Shinozaki, Nobuyasu Mizutani, Mineharu Tsukada, N. Kamehara
Authors: Mineharu Tsukada, Jeffrey S. Cross, M. Fujiki, M. Tomotani, Y. Kotaka
Authors: Tsuyoshi Aoki, Masao Kondo, Mineharu Tsukada, Kazuaki Kurihara, Makoto Kuwabara
Abstract: Two-dimensional Pb0.865La0.09Zr0.65Ti0.35O3 (PLZT) photonic crystals with hexagonal arrays of air holes on (001) Pt-sputtered magnesium oxide substrates were fabricated using a sol-gel process with resist molds. The PLZT photonic crystals have a thickness of 200 nm, and the period of hexagonal array and the radius of air holes were 400 or 450 nm and 135 or 165 nm, respectively. The PLZT photonic crystals were primarily orientated along the c-axis. The strain hysteresis loop of the photonic crystals suggested that the photonic crystals are ferroelectric. Several peaks within range of wavelength between 500 nm and 1000 nm appeared in the optical reflection spectra from the cleaved facet of the photonic crystals. The peaks have polarization dependence and the frequency bands of the each peak were close to that of photonic band gaps (PBGs) expected by the calculations.
Authors: Yuki Hasegawa, Masafumi Kobune, Yusuke Daiko, Atsushi Mineshige, Tetsuo Yazawa, Hironori Fujisawa, Masaru Shimizu, Mineharu Tsukada, Hideshi Yamaguchi, Koichiro Honda
Abstract: On the basis of experimental data on the piezoelectric pinpoint composition of ceramics of the ternary system Pb(Mg1/3Nb2/3)O3-PbZrO3-PbTiO3 (PMNZT), which we investigated in our previous report, epitaxial PbMg0.047Nb0.095Zr0.416Ti0.442O3 thick films with thicknesses ranging from 0.4 to 1.9 m were fabricated on Pt(100)/MgO(100) substrates by metalorganic decomposition. The film- thickness dependence on the structural and electrical properties (dielectric, piezoelectric and ferroelectric properties) was investigated. All PMNZT films exhibited a highly uniform (001) orientation, regardless of the film thickness. The cross-sectional transmission electron microscope micrographs and all the physical data suggest that high-density PMNZT thick films with a thickness  1.0 m can be expected to function as highly electrically insulating capacitors with high potential for piezo- and ferroelectric applications.
Authors: Mineharu Tsukada, Jeffrey S. Cross, M. Fujiki, Kiyotaka Matsuura, H. Ashida, S. Otani
Authors: Masao Kondo, M. Hida, Mineharu Tsukada, Kazuaki Kurihara, M. Kutami, N. Kamehara
Authors: Mineharu Tsukada, Masao Kondo, Kazuaki Kurihara, N. Kamehara
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