Giant coercive field of nanometer-sized iron oxide

被引：305

作者：

Jin, J ^{[1
]}

Ohkoshi, S ^{[1
]}

Hashimoto, K ^{[1
]}

机构：

[1] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan

来源：

ADVANCED MATERIALS | 2004年 / 16卷 / 01期

关键词：

D O I：

10.1002/adma.200305297

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanocrystals of iron oxide in a silica matrix exhibiting a giant H-c value of 2.0 Tat room temperature are reported. The nanocomposite was obtained by combining reverse-micelle and sol-gel methods. The nanocrystals of iron oxide are composed of the epsilon-Fe2O3 phase, with rod-like particles 100-140 nm long and 20-40 nm wide. The Figure shows the hysteresis curve of the nanocrystals.

引用

页码：48 / +

页数：5

共 18 条

[1]

[Anonymous], 1997, MAGNETIC HYSTERESIS

[2] MAGNETIC COERCIVITY OF FE3O4 PARTICLE-SYSTEMS [J].

ARAJS, S ;

AMIN, N ;

ANDERSON, EE .

JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) :5122-5123

[3]

CHAUDRON MG, 1965, CR HEBD ACAD SCI, V261, P4423

[4]

Chikazumi S, 1997, Physics of ferromagnetism

[5]

Cornell R.M., 1996, The Iron Oxide: Structure, Properties, Reactions, Occurance and Uses

[6]

Cullity B. D., 1972, INTRO MAGNETIC MAT

[7] Magnetic properties of Fe2O3 particles prepared by sol-gel method [J].

Dormann, JL ;

Viart, N ;

Rehspringer, JL ;

Ezzir, A ;

Niznansky, D .

HYPERFINE INTERACTIONS, 1998, 112 (1-4) :89-92

[8] Characterization of iron oxide nanoparticles in an Fe2O3-SiO2 composite prepared by a sol-gel method [J].

Ennas, G ;

Musinu, A ;

Piccaluga, G ;

Zedda, D ;

Gatteschi, D ;

Sangregorio, C ;

Stanger, JL ;

Concas, G ;

Spano, G .

CHEMISTRY OF MATERIALS, 1998, 10 (02) :495-502

[9] Size and shape effect on the canted antiferromagnetism in α-Fe2O3 particles [J].

Fiorani, D ;

Testa, AM ;

Suber, L ;

Angiolini, M ;

Montone, A ;

Polichetti, M .

NANOSTRUCTURED MATERIALS, 1999, 12 (5-8) :939-942

[10]

Fiorani D., 1993, FUNDAMENTAL PROPERTI

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