CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Microwave Magnetic Permeability of Fe3O4 Nanoparticles |
ZHENG Hong, YANG Yong, WEN Fu-Sheng, YI Hai-Bo,ZHOU Dong, LI Fa-Shen |
Institute of Applied Magnetics, Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 |
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Cite this article: |
ZHENG Hong, YANG Yong, WEN Fu-Sheng et al 2009 Chin. Phys. Lett. 26 017501 |
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Abstract Well-dispersed Fe3O4 nanoparticles are synthesized via an oxidization method with NaNO2 as oxidant. The microwave magnetic properties of the composites are studied with different volume fractions of Fe3O4 nanoparticles. It is found that a lower volume fraction corresponds to a higher magnetic resonance frequency. This could be ascribed to the enhancement of exchange interaction with a weakened dipolar interaction when the volume fraction decreases.
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Keywords:
75.50.Gg
75.40.Gb
75.75.+a
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Received: 14 May 2008
Published: 24 December 2008
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