Magnetic Properties for the Single-domain Co Fe2O4 Nanoparticles Synthesized by the Hydrothermal Method

Magnetic Properties for the Single-domain Co Fe2O4 Nanoparticles Synthesized by the Hydrothermal Method

The aim of this work was to investigate the size-related magnetism for the single-domain Co Fe2O4 nano-particles synthesized using the hydrothermal method. The effects of the reaction temperature and the reaction time on the lattice constants, particle morphologies, and the room-temperature magnetic...

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Veröffentlicht in:武汉理工大学学报：材料科学英文版 2015 (6), p.1140-1146
1. Verfasser: YANG Zhi ZHANG Yue SONG Yu WANG Jiawei CHEN Yuang ZHANG Zhe DUAN Nian RUAN Xuefeng
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合作
平均晶粒尺寸
振动样品
水热法合成
磁特性
纳米磁性颗粒
透射电子显微镜
钴铁氧体
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description The aim of this work was to investigate the size-related magnetism for the single-domain Co Fe2O4 nano-particles synthesized using the hydrothermal method. The effects of the reaction temperature and the reaction time on the lattice constants, particle morphologies, and the room-temperature magnetic properties were studied from the X-ray diffraction, the transmission electron microscope, and the vibrating-sample magnetometer. The experimental results show that the samples are composed of Co Fe2O4 nano-particles with an average crystallite size（D） smaller than 40 nm, and the magnetic properties of the samples can be manipulated in a wide range： the MS values vary from smaller than 50 emu/g to close to 80 emu/g, and the HC values are between about 200 Oe and 2000 Oe. Additionally, the relationship between HC and 1/D^3/2 satisfi es linearship, showing the characteristic of single-domain structure. These results indicate that the single-domain Co Fe2O4 nano-particles with size controlled between the superparamagnetic critical size and single-domain critical size can be easily prepared using this hydrothermal method.
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subjects 合作
平均晶粒尺寸
振动样品
水热法合成
磁特性
纳米磁性颗粒
透射电子显微镜
钴铁氧体
title Magnetic Properties for the Single-domain Co Fe2O4 Nanoparticles Synthesized by the Hydrothermal Method
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