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Featured researches published by Tetsuya Hidaka.


Applied Physics Letters | 1995

Magnetic properties of rapidly quenched high remanence Zr added Sm–Fe–N isotropic powders

Tetsuhito Yoneyama; Tomomi Yamamoto; Tetsuya Hidaka

The magnetic properties and microstructures of rapidly quenched Sm–Fe–N powders with low Sm contents and Zr and Co addition have been studied. High remanence values of 9.4 kG with high HcJ values of 7–10 kOe were obtained for isotropic powders. The x‐ray diffraction analysis and transmission electron microscopy (TEM) observation showed these alloy powders to consist of a nanoscale mixture with a SmFe7Nx phase with the TbCu7‐type structure and α‐Fe in the size range of 20–30 nm. It is presumed that the high remanence is due to the small crystal size and exchange coupling at interphase boundaries.


Archive | 2004

R-t-b system rare earth permanent magnet

Chikara Ishizaka; Gouichi Nishizawa; Tetsuya Hidaka; Akira Fukuno; Nobuya Uchida


Archive | 1995

Magnet and bonded magnet

Tetsuhito Yoneyama; Tomomi Yamamoto; Tetsuya Hidaka; Akira Fukuno


Archive | 2003

R-t-b-based rare earth permanent magnet

Tetsuya Hidaka; Hironari Okada; Kazuya Sakamoto; 一也 坂元; 宏成 岡田; 徹也 日▲高▼


Materials Transactions Jim | 1996

Magnetic properties of rapidly quenched (Sm,Zr)(Fe,Co)7-N+α-Fe

Tomomi Yamamoto; Tetsuya Hidaka; Tetsuhito Yoneyama; H. Nishio; Akira Fukuno


Journal of The Japan Society of Powder and Powder Metallurgy | 1999

Development of SmFe2Nx+α Fe Nanocomposite Magnets

Akira Fukuno; Tomomi Yamamoto; Tetsuya Hidaka


Archive | 2004

Method for producing sintered magnet and alloy for sintered magnet

Tetsuya Hidaka; Chikara Ishizaka


Archive | 1997

Preparation of magnet

Akira Fukuno; Tomomi Yamamoto; Tetsuhito Yoneyama; Tetsuya Hidaka


Archive | 2003

Method for producing r-t-b based rare earth element permanent magnet

Gouichi Nishizawa; Chikara Ishizaka; Tetsuya Hidaka; Akira Fukuno


Archive | 2012

RARE EARTH SINTERED MAGNET, METHOD FOR MANUFACTURING RARE EARTH SINTERED MAGNET AND ROTARY MACHINE

Tetsuya Hidaka; 日▲高▼ 徹也; Kazuo Sato; 佐藤 和生; Kazuya Sakamoto; 坂元 一也; Shinya Fujito; 藤戸 津哉; Motoaki Hosako; 寳迫 元彰; Motohisa Murata; 村田 素久; Koji Mitake; 三竹 晃司

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