Journal
MATERIALS LETTERS
Volume 120, Issue -, Pages 9-12Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.01.022
Keywords
Composite material; Alloy; Core-shell structure; Magnetic property; Exchange-coupling
Funding
- National Basic Research Program of China [2012CB933101]
- National Science Fund of China [51371092, 51171075]
- Fundamental Research Funds for the Central Universities [Lzujbky-2013-32, lzujbky-2013-ct01]
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Hard/soft SrFe12O19/FeCo composite nanofibers with core-shell structure have been synthesized by reduction process in a hydrogen atmosphere. As the precursor, SrFe12O19/CoFe2O4 core-shell nanofibers were prepared by coaxial electrospinning and calcination process. SrFe12O19/CoFe2O4 composite ferrites were formed after calcined at 900 degrees C for 1 h. The core-shell nanofibers show an enhanced saturation magnetization (M-s) of 60.9 emu/g for SrFe12O19/CoFe2O4 and 68.8 emu/g for SrFe12O19/FeCo comparing with SrFe12O19 nanofibers (53.4 emu/g). The coercivities (H-c) for SrFe12O19/CoFe2O4 and SrFe12O19/FeCo core-shell nanofibers decrease to 3190 Oe and 1249 Oe, respectively. The hysteresis loop for SrFe12O19/FeCo core-shell nanofibers shows a single-phase magnetization behavior. The improvement in magnetic properties for core-shell structure composite nanofibers is attributed to the exchange-coupling interaction between the hard and soft phases. (C) 2014 Elsevier B.V. All rights reserved.
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