Structure and Magnetic Properties of FeCo/Al2O3 Nanocomposites

Chemical Research in Chinese Universities ›› 2010, Vol. 26 ›› Issue (3): 344-347.

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Structure and Magnetic Properties of FeCo/Al₂O₃ Nanocomposites

LI Hai-bo^1*, XU Shi-chong^1,2, LIU Mei¹, FENG Ming^1,2 and YIN Ji-zhe¹

1. Institute of Condensed Matter Physics and Materials Science, Jilin Normal University, Siping 136000, P. R. China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China

Received:2009-02-15 Revised:2009-12-31 Online:2010-05-25 Published:2010-07-27
Contact: LI Hai-bo. E-mail: lihaibo@jlnu.edu.cn
Supported by:
Supported by the Development Project of Science and Technology of Jilin Province, China(No.20090144).

Abstract

Abstract: The soft magnetic nanocomposites with equiatomic FeCo particles dispersed in Al₂O₃ matrix were synthesized via a sol-gel technique combined with H₂ reduction method. The samples were characterized by X-ray diffraction, transmission electron microscopy and vibrating sample magnetometer. The FeCo nanoparticles in all the samples have the typical bcc structure. With the decreasing of Al₂O₃ content, the mean grain size of FeCo in the nanocomposites and the saturation magnetization of the samples increase, while the coercivity of samples increases firstly and then decreases due to different magnetic mechanisms.

Key words: FeCo/Al2O3, Nanocomposite, Structure, Magnetic property

LI Hai-bo*, XU Shi-chong, LIU Mei, FENG Ming and YIN Ji-zhe. Structure and Magnetic Properties of FeCo/Al₂O₃ Nanocomposites[J]. Chemical Research in Chinese Universities, 2010, 26(3): 344-347.

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Structure and Magnetic Properties of FeCo/Al₂O₃ Nanocomposites

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