Syntheses of iron oxide nanoplates by hydrothermal treatment of iron-oleate precursor and their magnetization reversal

被引：3
|
作者：
Kamei, Yuuki [1 ]
Wakayama, Kenichi [1 ]
Makinose, Yuki [2 ]
Endo, Yasushi [3 ]
Matsushita, Nobuhiro [1 ,4 ]
机构：
[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan
[2] Shimane Univ, Interdisciplinary Grad Sch Sci & Engn, 1060 Nishikawatsu, Matsue, Shimane 6908504, Japan
[3] Tohoku Univ, Grad Sch Engn, Dept Elect Engn, Aoba Ku, 6-6-5 Aramaki, Sendai, Miyagi 9808579, Japan
[4] Tokyo Inst Technol, Grad Sch Engn, Dept Chem & Mat Sci, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2017年 / 223卷
关键词：
Magnetic iron oxide; Nanoplates; Hydrothermal synthesis; Magnetic force microscopy; GAMMA-FE2O3; NANOPARTICLES; COLLOIDAL SYNTHESIS; FE3O4; NANODISC; MAGNETITE; NANOCRYSTALS; NANORODS; ARRAYS; SIZE;
D O I：
10.1016/j.mseb.2017.06.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Magnetic iron oxide (Fe3-xO4) nanoplates with a high aspect ratio (lateral size/thickness ratio of >50) were synthesized via a facile hydrothermal treatment of an iron-oleate precursor. The magnetic domain configuration of the Fe3-xO4 nanoplates was observed by magnetic force microscopy (MFM). Single domain magnetic polarity was observed in the remnant state of isolated Fe3-xO4 nanoplates, with a lateral size of ca. 300 nm and thickness of 7.6 nm. The magnetization orientation of isolated Fe3-xO4 nano plates was mainly determined by the magnetic shape anisotropy originating from their high aspect ratio. Magnetization reversal occurred via coherent rotation upon switching the external magnetic field, rather than by domain wall nucleation. Micro-magnetic simulations based on the Landau-Lifshitz Gilbert equation supported the conclusions drawn from the experimental results. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：70 / 75
页数：6
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