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

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

doi:10.1016/j.jeurceramsoc.2011.02.016

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

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

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

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. e{open}-Fe₂O₃ with the crystallite size of 20-30nm was obtained after annealing the film deposited in SiO₂ area ratio, x=0.33-0.42 at 900°C. Lower SiO₂ area ratio (x) than 0.25 and higher annealing temperature resulted in precipitation of α-Fe₂O₃ with the larger crystallite size than 40nm. 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 e{open}-Fe₂O₃/SiO₂ composite thin film showed ferromagnetic hysteresis with coercive force of 0.14T.

Original language	English
Pages (from-to)	2459-2462
Number of pages	4
Journal	Journal of the European Ceramic Society
Volume	31
Issue number	14
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.02.016
Publication status	Published - 2011 Nov
Externally published	Yes

Keywords

Films
Iron oxide
Magnetic properties
Nanocomposites
Thermal annealing

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2011.02.016

Cite this

@article{ae7df608202f4bce92d232e4b07c6f47,

title = "Crystallization and magnetic property of iron oxide nanoparticles precipitated in silica glass matrix",

abstract = "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. e{open}-Fe2O3 with the crystallite size of 20-30nm was obtained after annealing the film deposited in SiO2 area ratio, x=0.33-0.42 at 900°C. Lower SiO2 area ratio (x) than 0.25 and higher annealing temperature resulted in precipitation of α-Fe2O3 with the larger crystallite size than 40nm. 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 e{open}-Fe2O3/SiO2 composite thin film showed ferromagnetic hysteresis with coercive force of 0.14T.",

keywords = "Films, Iron oxide, Magnetic properties, Nanocomposites, Thermal annealing",

author = "Y. Masubuchi and Y. Sato and A. Sawada and T. Motohashi and H. Kiyono and S. Kikkawa",

year = "2011",

month = nov,

doi = "10.1016/j.jeurceramsoc.2011.02.016",

language = "English",

volume = "31",

pages = "2459--2462",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier BV",

number = "14",

}

TY - JOUR

T1 - Crystallization and magnetic property of iron oxide nanoparticles precipitated in silica glass matrix

AU - Masubuchi, Y.

AU - Sato, Y.

AU - Sawada, A.

AU - Motohashi, T.

AU - Kiyono, H.

AU - Kikkawa, S.

PY - 2011/11

Y1 - 2011/11

N2 - 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. e{open}-Fe2O3 with the crystallite size of 20-30nm was obtained after annealing the film deposited in SiO2 area ratio, x=0.33-0.42 at 900°C. Lower SiO2 area ratio (x) than 0.25 and higher annealing temperature resulted in precipitation of α-Fe2O3 with the larger crystallite size than 40nm. 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 e{open}-Fe2O3/SiO2 composite thin film showed ferromagnetic hysteresis with coercive force of 0.14T.

AB - 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. e{open}-Fe2O3 with the crystallite size of 20-30nm was obtained after annealing the film deposited in SiO2 area ratio, x=0.33-0.42 at 900°C. Lower SiO2 area ratio (x) than 0.25 and higher annealing temperature resulted in precipitation of α-Fe2O3 with the larger crystallite size than 40nm. 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 e{open}-Fe2O3/SiO2 composite thin film showed ferromagnetic hysteresis with coercive force of 0.14T.

KW - Films

KW - Iron oxide

KW - Magnetic properties

KW - Nanocomposites

KW - Thermal annealing

UR - http://www.scopus.com/inward/record.url?scp=80051469182&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80051469182&partnerID=8YFLogxK

U2 - 10.1016/j.jeurceramsoc.2011.02.016

DO - 10.1016/j.jeurceramsoc.2011.02.016

M3 - Article

AN - SCOPUS:80051469182

SN - 0955-2219

VL - 31

SP - 2459

EP - 2462

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 14

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this