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Nanoscale characterization and magnetic reversal mechanism investigation of electrospun NiFe2O4 multi-particle-chain nanofibres

Zhang, J; Fu, J; Tan, G; Li, F; Luo, C; Zhao, J; Xie, E; Xue, D; Zhang, H; Mellors, NJ; Peng, Y

Authors

J Zhang

J Fu

G Tan

F Li

C Luo

J Zhao

E Xie

D Xue

H Zhang

NJ Mellors

Y Peng



Abstract

NiFe2O4 multi-particle-chain nanofibres have been successfully fabricated using electrospinning followed by calcination, and their morphology, chemistry and crystal structure were characterized at the nanoscale. Individual NiFe2O4 nanofibres were found to consist of many nanocrystallites stacked along the nanofibre axis. Chemical analysis shows that the atomic ratio of Ni:Fe is 1:2, indicating that the composition was NiFe2O4. The crystal structure of individual NiFe2O4 multi-particle-chain nanofibres proved to be polycrystalline with a face centered cubic (fcc) structure. The nanocrystallites in the nanofibres were revealed to have a single-crystal structure with random crystallographic orientations. The magnetic measurements reveal that the NiFe2O4 multi-particle-chain nanofibres have a coercivity force of 166 Oe. A “chain of sheets” micromagentism model was proposed to interpret the observed magnetic behaviour of the NiFe2O4 multi-particle-chain nanofibres. Simulation studies of the coercivity are in good agreement with the experimental results at room temperature. It is believed that this work will significantly expand the use and application of these compounds in the field of biomagnetic nano-devices and improve understanding of the magnetic origin of spinel ferrites.

Journal Article Type Article
Acceptance Date Feb 17, 2012
Online Publication Date Feb 21, 2012
Publication Date Feb 21, 2012
Deposit Date Feb 10, 2017
Journal Nanoscale
Print ISSN 2040-3364
Electronic ISSN 2040-3372
Publisher Royal Society of Chemistry
Volume 4
Issue 8
Pages 2754
DOI https://doi.org/10.1039/c2nr00024e
Publisher URL http://dx.doi.org/10.1039/c2nr00024e
Related Public URLs http://pubs.rsc.org/en/Journals/JournalIssues/NR#!recentarticles&adv



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