Low-Temperature Synthesis and Nanomagnetism of Large-Area α-Fe2O3 Nanobelts

被引：3

作者：

Zhong, Minglong ^{[1
]}

Liu, Zhongwu ^{[1
]}

Yu, Hongya ^{[1
]}

Zhong, Xichun ^{[1
]}

Zeng, Dechang ^{[1
]}

Ramanujan, R. V. ^{[2
]}

机构：

[1] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2013年 / 13卷 / 02期

关键词：

Thermal Growth; Nanobelts; Nanoflakes; Magnetic Materials; OXIDE NANOWIRES; GROWTH; MECHANISM; ARRAYS;

D O I：

10.1166/jnn.2013.5976

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Large-area one dimensional (1D) alpha-Fe2O3 nanostructures were grown on iron substrates by catalyst-free thermal oxidation process at low temperatures in air. The structure characterization revealed that the nanostructures are single crystalline alpha-Fe2O3. Two kinds of alpha-Fe2O3 nanostructures, nanobelts and nanoflakes, were obtained due to the different growth temperature range. A surface diffusion mechanism is proposed to account for the nanobelts and nanoflakes growth. The Morin temperature T-M of pure 1D alpha-Fe2O3 nanostructures is 121 K, which is far below their bulk counterparts. The coercive field depends on temperature, and takes values 471 Oe at 5 K and about 260 Oe when the temperature is greater than TM, respectively.

引用

页码：1525 / 1529

页数：5

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