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298 results on '"Nishio, Kazuyuki"'

9. Dynamic write/read characteristics of alumina nanohole patterned media with a soft underlayer measured with a perpendicular magnetic head

Author

Oshima, Hirotaka, Kikuchi, Hideyuki, Nakao, Hiroshi, Kamimura, Takuya, Morikawa, Takeshi, Matsumoto, Koji, Yuan, Jianfeng, Ishio, Shunji, Nishio, Kazuyuki, Masuda, Hideki, and Itoh, Ken-ichi

Subjects
Magnetic recorders and recording -- Research, Aluminum oxide -- Magnetic properties, Read/write heads -- Design and construction, Magnetic recorders and recording -- Heads, Magnetic recorders and recording -- Design and construction, Business, Electronics, Electronics and electrical industries
Abstract

We present dynamic write/read characteristics of alumina nanohole patterned media having a soft magnetic underlayer (SUL), which offer good flyability of a perpendicular magnetic head with a flight height of 10 am. Increase in the head-field gradient in the recording layer owing to the SUL was confirmed by measurements of signal-to-noise ratio and isolated magnetic transition width. The writability of the magnetic nanopillars was clearly demonstrated by visualization of the recorded patterns with a magnetic force microscope. Index Terms--Nanohole arrays, patterned media, perpendicular magnetic recording, soft magnetic underlayer (SUL).

Published
2007

14. Nanohole-array size dependence of soft x-ray generation enhancement from femtosecond-laser-produced plasma.

Author

Nishikawa, Tadashi, Nakano, Hidetoshi, Oguri, Katsuya, Uesugi, Naoshi, Nishio, Kazuyuki, and Masuda, Hideki

Subjects
LASER plasmas, ALUMINUM oxide, LASERS, FEMTOCHEMISTRY, NANOSTRUCTURES
Abstract

Nanostructured targets are very attractive for enhancing the intensity of x-ray pulses generated from laser-produced-plasma. In order to clarify the enhancement mechanism, the nanohole-array size dependence of the characteristics of soft x-ray pulse generation from femtosecond-laser-produced plasma was investigated in detail. We found that the highest x-ray intensity can be obtained and the x-ray pulse duration kept relatively short with a nanohole-array alumina target with a 500 nm hole interval and a 450 nm hole diameter. A 40-fold soft x-ray fluence enhancement and a nine-fold soft x-ray pulse peak intensity enhancement can be obtained. The relatively short x-ray pulse duration of 19 ps can be maintained because the target structure has high local density and nanometer-sized spaces. Similar enhancement effects can be expected by using a nanostructured target with wall thickness of less than 100 nm, space size of around a few 100 nm, and nanostructure depth larger than 20 μm. [ABSTRACT FROM AUTHOR]

Published
2004
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36. Effects of Intermediates between Vitamins K2 and K3 on Mammalian DNA Polymerase Inhibition and Anti-Inflammatory Activity

Author

Mizushina, Yoshiyuki, primary, Maeda, Jun, additional, Irino, Yasuhiro, additional, Nishida, Masayuki, additional, Nishiumi, Shin, additional, Kondo, Yasuyuki, additional, Nishio, Kazuyuki, additional, Kuramochi, Kouji, additional, Tsubaki, Kazunori, additional, Kuriyama, Isoko, additional, Azuma, Takeshi, additional, Yoshida, Hiromi, additional, and Yoshida, Masaru, additional

Published
2011
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