Structural and Magnetic Properties of CoFe2O4 Thin Films via Sol-Gel Method

Shao Hua Yang; Ding Guo Li; Hai Bin Yang; Hong Chun Yan

doi:10.4028/www.scientific.net/AMM.716-717.159

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 716-717Structural and Magnetic Properties of CoFe2O4 Thin...

Structural and Magnetic Properties of CoFe₂O₄Thin Films via Sol-Gel Method

Abstract:

Cobalt ferrite (CoFe₂O₄) thin films have been prepared on Si (001) substrates, with different calcined temperatures (Tcal=400°C~800°C). The films structure was studied by X-ray diffraction (XRD) and their surface was examined by scanning electron microscopy (SEM). The magnetic properties were measured with a vibrating sample magnetometer (VSM). For low calcined temperatures, the films presented a mixture of a CoFe₂O₄ phase, with the cubic spinel structure, and cobalt and iron antiferromagnet oxides with CoO and FeO stoichiometries. As the calcined temperature increased, the CoO and FeO relative content strongly decreased, so that for Tcal=800°Cthe films were composed mainly by polycrystalline CoFe₂O₄. The magnetic hysteresis cycles measured in the films were horizontally shifted due to an exchange coupling field originated by the presence of the antiferromagnetic phases.

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Applied Mechanics and Materials (Volumes 716-717)

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159-162

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https://doi.org/10.4028/www.scientific.net/AMM.716-717.159

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Online since:

December 2014

Authors:

Shao Hua Yang*, Ding Guo Li, Hai Bin Yang, Hong Chun Yan

Keywords:

CoFe₂O₄ Thin Films, Magnetic Properties, Sol-Gel Method, Structural Properties

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