SEEK: Salford Environment for Expertise and Knowledge

Journal Article (Refereed)
February 2012

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

Zhang, J & Fu, J & 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.

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.

Notes

 

This work although very recently published explores the potential of new fabrication and manufacturing techniques to large-scale production of nano sized magnetic ferrite materials for large volume application such as high density storage. Working with a international team my contribution to this work is the development of the experiment and analysis of the crystal structure using a variety of experimental techniques. The high density storage market is a multi billion pound industry and the next generation of products needs to be cost effective, scalable from nano sized materials and lab based techniques to full production.
 

Authors

SEEK Members

External Authors

Erqing Xie

Fashen Li

Yong Peng

Desheng Xue

Jiecai Fu

Junli Zhang

Publication Details

Journal Name
ACS Nano