BaFe12O19 single-particle-chain nanofibers : preparation, characterization, formation principle, and magnetization reversal mechanism

Zhang, J; Jiecai, F; Li, F; Xie, E; Xue, D; Mellors, N.J.; Peng, Y

Abstract

BaFe12O19 single-particle-chain
nanofibers have been successfully prepared by
an electrospinning method and calcination
process, and their morphology, chemistry,
and crystal structure have been characterized
at the nanoscale. It is found that individual
BaFe12O19 nanofibers consist of single nanoparticles which are found to stack along the
nanofiber axis. The chemical analysis shows that the atomic ratio of Ba/Fe is 1:12, suggesting a
BaFe12O19 composition. The crystal structure of the BaFe12O19 single-particle-chain nanofibers
is proved to be M-type hexagonal. The single crystallites on each BaFe12O19 single-particlechain
nanofibers have random orientations. A formation mechanism is proposed based on
thermogravimetry/differential thermal analysis (TG-DTA), X-ray diffraction (XRD), and transmission
electron microscopy (TEM) at six temperatures, 250, 400, 500, 600, 650, and 800 �C.
The magnetic measurement of the BaFe12O19 single-particle-chain nanofibers reveals that the
coercivity reaches a maximum of 5943 Oe and the saturated magnetization is 71.5 emu/g at
room temperature. Theoretical analysis at the micromagnetism level is adapted to describe the
magnetic behavior of the BaFe12O19 single-particle-chain nanofibers.

Citation

Zhang, J., Jiecai, F., Li, F., Xie, E., Xue, D., Mellors, N., & Peng, Y. (2012). BaFe12O19 single-particle-chain nanofibers : preparation, characterization, formation principle, and magnetization reversal mechanism. ACS nano, 6(3), 2273-2280. https://doi.org/10.1021/nn204342m

• Journal Article Type: Article
• Acceptance Date: Feb 3, 2012
• Online Publication Date: Feb 13, 2012
• Publication Date: Mar 27, 2012
• Deposit Date: Feb 21, 2012
• Journal: ACS Nano
• Print ISSN: 1936-0851
• Electronic ISSN: 1936-086X
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 3
• Pages: 2273-2280
• DOI: https://doi.org/10.1021/nn204342m
• Publisher URL: http://dx.doi.org/10.1021/nn204342m
• Related Public URLs: http://pubs.acs.org/journal/ancac3