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Synthesis and Magnetic Properties of Maghemite (γ-Fe2O3) Short-Nanotubes

Wu, W. and Xiao, X. H. and Zhang, S. F. and Peng, T. C. and Zhou, J. and Ren, F. and Jiang, C. Z. (2010) Synthesis and Magnetic Properties of Maghemite (γ-Fe2O3) Short-Nanotubes. Nanoscale Research Letters, 5 (9). pp. 1474-1479.

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Abstract

We report a rational synthesis of maghemite (γ-Fe2O3) short-nanotubes (SNTs) by a convenient hydrothermal method and subsequent annealing process. The structure, shape, and magnetic properties of the SNTs were investigated. Room-temperature and low-temperature magnetic measurements show that the as-fabricated γ-Fe2O3 SNTs are ferromagnetic, and its coercivity is nonzero when the temperature above blocking temperature (TB). The hysteresis loop was operated to show that the magnetic properties of γ-Fe2O3 SNTs are strongly influenced by the morphology of the crystal. The unique magnetic behaviors were interpreted by the competition of the demagnetization energy of quasi-one-dimensional nanostructures and the magnetocrystalline anisotropy energy of particles in SNTs.

Item Type:Article
Uncontrolled Keywords:Short-nanotubes, γ-Fe2O3, Magnetic properties
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nanomagnetics
Material Science > Nanostructured materials
ID Code:9535
Deposited By:SPI
Deposited On:21 Oct 2010 09:20
Last Modified:21 Oct 2010 09:20

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