A structural study and magnetic properties of electrospun carbon/manganese ferrite (C/MnFe 2 O 4 ) composite nanofibers

Autor: Santi Maensiri, Sukanya Nilmoung, Somboonsub Rodporn, Pinit Kidkhunthod, Santi Phumying, Sompin Mahakot
Rok vydání: 2016
Předmět:
Zdroj: Journal of Magnetism and Magnetic Materials. 401:436-442
ISSN: 0304-8853
DOI: 10.1016/j.jmmm.2015.10.085
Popis: Carbon/manganese ferrite (C/MnFe 2 O 4 ) composite nanofibers were fabricated using electrospinning technique followed by carbonization process under mixed of air and argon atmosphere at 400, 600 and 800 °C, respectively. The prepared composite nanofibers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and X-ray absorption spectroscopy (XAS) including X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). After calcination at 800 °C, the composite nanofibers of C/MnFe 2 O 4 were obtained with a mean diameter of nanofibers of approximately 700–800 nm. The structure of MnFe 2 O 4 was successfully studied using XAS technique and was found to be cubic spinel with a coupling of Mn 2 /Mn 3+ and Fe 3+ oxidation states. All composite nanofibers exhibited ferromagnetic behavior especially after being calcined at 800 °C. This ferromagnetic properties were related to the distribution of cations over tetrahedral and octahedral sites as revealed by EXAFS results.
Databáze: OpenAIRE
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