Crystallization and magnetic property of iron oxide nanoparticles precipitated in silica glass matrix

Masubuchi, Y.; Sato, Y.; Sawada, A.; Motohashi, T.; Kiyono, H.; Kikkawa, S.

Crystallization and magnetic property of iron oxide nanoparticles precipitated in silica glass matrix

Masubuchi, Y.; Sato, Y.; Sawada, A. et al.

Journal of the European Ceramic Society, 2011, 31(14), 2459-2462

Permalink : https://hdl.handle.net/2115/47352

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アクセス権	open access
URI	https://hdl.handle.net/2115/47352
タイトル	Crystallization and magnetic property of iron oxide nanoparticles precipitated in silica glass matrix
著者	Masubuchi, Y. ; Sato, Y. ; Sawada, A. ; Motohashi, T. ; Kiyono, H. ; Kikkawa, S.
e-Rad_Researcher 80466440 著者名 Masubuchi, Y.
著者名 Sato, Y.
著者名 Sawada, A.
著者名 Motohashi, T.
著者名 Kiyono, H.
著者名 Kikkawa, S.
言語	英語
キーワード	Iron oxide
	Thin film
	Nanocomposites
	Magnetic properties
	Thermal annealing
発行日	2011-11
出版者	Elsevier
収録物名	Journal of the European Ceramic Society
巻(号)	31(14)
ページ	2459-2462
抄録	Crystallization and magnetic property of Fe2O3 nanoparticle precipitated in SiO2 matrix was investigated. Fe2O3/SiO2 nanocomposite thin film was obtained by annealing of the amorphous Fe-Si-O thin film deposited by RF-magnetron sputtering of (α-Fe2O3)_[1-x]/(SiO2)x composite targets. The Fe2O3 crystallite size increased with decreasing SiO2 area ratio, x of the target and increasing annealing temperature ε-Fe2O3 with the crystallite size of 20～30 nm was obtained after annealing the film deposited in SiO2 area ratio, x = 0.33～0.42 at 900℃. Lower SiO2 area ratio (x) than 0.25 and higher annealing temperature resulted in precipitation of α-Fe2O3 with the larger crystallite size than 40 nm. In the case of SiO2 area ratio, x ≥ 0.50, the annealed film was amorphous and showed higher magnetization and smaller coercivity due to the precipitation of very small crystalline γ-Fe2O3. The ε-Fe2O3/SiO2 composite thin film showed ferromagnetic hysteresis with coercive force of 0.14 T.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0955-2219
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jeurceramsoc.2011.02.016