Toshiki Matsushima

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Humans can visually recognize material categories of objects, such as glass, stone, and plastic, easily. However, little is known about the kinds of surface quality features that contribute to such material class recognition. In this paper, we examine the relationship between perceptual surface features and material category discrimination performance for(More)
We have deposited nearly stress-free single-crystal thin films of ͑001͒ Pb͑Mn, Nb͒O 3 –Pb͑Zr, Ti͒O 3 ͑PMnN-PZT͒ on ͑001͒MgO substrates by rf-magnetron sputtering using a quenching process after the film growth. It is found that single c-domain/single-crystal thin films of PMnN-PZT containing 5%–10% PMnN show a strong hard ferroelectric response with 2E c Х(More)
Ferroelectric thin films with high Curie temperature T<sub>c</sub> and high piezoelectric coupling factor k are fascinated for a better piezoelectric MEMS. Pb(Zr, Ti)O<sub>3</sub> (PZT)-based ferroelectric ceramics exhibit high piezoelectricity, but the T<sub>c</sub> is not high, i.e. T<sub>c</sub> &lt;;400&#x00B0;C. PZT-based piezoelectric thin films with(More)
Single crystal thin films of the PZT-based ternary perovskite, xPb(Mn,Nb)O<inf>3</inf>-(1-x)PZT, were fabricated by a magnetron sputtering on (001)MgO substrates. The sputtered thin films were quenched in air after the deposition. The PZT-based thin films exhibited the hard ferroelectric behavior with high piezoelectric coupling factors k<inf>t</inf>,(More)
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