Magnetic properties of α-Fe2O3 nanopallets

被引：1
|
作者：
Ying-Ying Xu [1 ]
Long Wang [2 ]
Tong Wu [3 ]
Rong-Ming Wang [1 ]
机构：
[1] Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics,University of Science and Technology Beijing
[2] Division of Energy and Environmental Measurement, National Institute of Metrology
[3] Department of Equipment Manufacture,Zhongshan Torch Polytechnic
来源：
Rare Metals | 2019年 / 38卷 / 01期
基金：
中国国家自然科学基金;
关键词：
α-Fe2O3; nanopallets; Magnetic property; Superparamagnetic behavior; Canted spins;
D O I：
暂无
中图分类号：
TQ138.11 []; TB383.1 [];
学科分类号：
070205 ; 080501 ; 0817 ; 1406 ;
摘要：
It is the result of a systemic study about uniform hematite nanopallets with length of about 100 nm, width of about 30 nm, and thickness of less than 10 nm. The sample has superparamagnetic(SPM) properties above the blocking temperature of ～16 K. The temperature dependence of magnetization was well fitted by Bloch Tlaw considering the dipolar interaction of the particles. The field dependence of magnetization was fitted with revised Langevin equation.The magnetization of the weak ferromagnetic(WF) canted spins contributes to the linear portion in the high field region;the surface uncompensated spins and the parasitic ferromagnetic moments due to the canted spins both contribute to the particle moments and the superparamagnetic behavior.
引用
收藏
页码：14 / 19
页数：6
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