Abstract
The SrFe12O19/poly (vinyl pyrrolidone) (PVP) composite fiber precursors were prepared by the sol-gel assisted electrospinning with ferric nitrate, strontium nitrate and PVP as starting reagents. Subsequently, the M-type strontium ferrite (SrFe12O19) nanofibers were derived from calcination of these precursors at 750–1,000 °C.The composite precursors and strontium ferrite nanofibers were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. The structural evolution process of strontium ferrite consists of the thermal decomposition and M-type strontium ferrite formation. After calcined at 750 °C for 2 h the single M-type strontium ferrite phase is formed by reactions of iron oxide and strontium oxide produced during the precursor decomposition process. The nanofiber morphology, diameter, crystallite size and grain morphology are mainly influenced by the calcination temperature and holding time. The SrFe12O19 nanofibers characterized with diameters of around 100 nm and a necklace-like structure obtained at 900 °C for 2 h, which is fabricated by nanosized particles about 60 nm with the plate-like morphology elongated in the preferred direction perpendicular to the c-axis, show the optimized magnetic property with saturation magnetization 59 A m2 kg−1 and coercivity 521 kA m−1. It is found that the single domain critical size for these M-type strontium ferrite nanofibers is around 60 nm.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Jahn L, Muller HG (1969) The coercivity of hard ferrite single crystal. Phys Status Solid A35(2):723–730
Castaneda SP, Martńez JR, Ruiz F et al (2002) Magnetic properties enhancement of M-Ba ferrites embedded in a SiO2 matrix. J Magn Magn Mater 250:160–163
Dho J, Lee EK, Park JY et al (2005) Effects of the grain boundary on the coercivity of barium ferrite BaFe12O19. J Magn Magn Mater 285(1–2):164–168
Nataraj SK, Kim BH, dela Cruz M (2009) Free standing thin webs of porous carbon nanofibers of polyacrylonitrile containing iron-oxide by electrospinning. Mater Lett 63:218–220
Shao CL, Guan HY, Liu YC (2004) Preparation of Mn2O3 and Mn3O4 nanofibers via anelectrospinning technique. J Solid State Chem 177:2628–2631
Lange H, Sioda M, Huczko A et al (2003) Nanocarbon production by arc discharge in water. Carbon 41(8):1617–1623
Morales AM, Lieber CM (1998) A laser ablation method for the synthesis of crystalline semiconductor nanowires. Science 279(5348):208–211
Yin LW, Bando Y, Zhu YC et al (2005) Single-crystalline AlN nanotubes with carbon-layer coatings on the outer and inner surfaces via a multiwalled-carbon-nanotube-template-induced route. Adv Mater 17(2):213–217
Wang WZ, Liu YK, Xu CK et al (2002) Synthesis of NiO nanorods by a novel simple precursor thermal decomposition approach. Chem Phys Lett 362(1–2):119–122
Ju YW, Park JH, Jung HR et al (2008) Electrospun MnFe2O4 nanofibers: preparation and morphology. Compos Sci Technol 68(7–8):1704–1709
Li D, McCann JT, Xia YN et al (2006) Electrospinning: a simple and versatile technique for producing ceramic nanofibers and nanotubes. J Am Ceram Soc 89(6):1861–1869
Xiang J, Shen XQ, Song FZ et al. (2009) Fabrication and magnetic properties of Ni0.5Zn0.5Fe2O4 nanofibers by electrospinning. Chin Phys C (In Press)
Sun Y, Li JY, Tan Y et al (2009) Fabrication of aluminum nitride (AlN) hollow fibers by carbothermalreduction and nitridation of electrospun precursor fibers. J Alloys Compd 471(1–2):400–403
Wu KH, Shin YM, Yang CC et al (2006) Preparation and characterization of bamboo charcoal/Ni0.5Zn0.5Fe2O4 composite with core-shell structure. Mater Lett 60(21–22):2707–2710
Hsuan FY, Pei CL (2006) Effects of pH and calcination temperatures on the formation of citrate-derived hexagonal barium ferrite particles. J Alloys Compd 416(1–2):222–227
Sivakumar M, Gedanken A, Thong W (2004) Nanophase formation of strontium hexaferrite fine powder by the sonochemical method using Fe (CO)5. J Magn Magn Mater 268(1–2):95–104
García-Cerda LA, Rodríguez-Fernández OS, Reséndiz-Hernández PJ (2004) Study of SrFe12O19 synthesized by the sol–gel method. J Alloys Compd 369:182–184
Wang J, Zeng C (2004) Growth of SrFe12O19 nanowires under an induced magnetic field. J Cryst Growth 270:729–733
Stoner EC, Wohlfarth EP (1991) A mechanism of magnetic hysteresis in heterorgeneous alloys. IEEE Trans Magn 27(4):3475–3518
Maaz K, Mumtaz A, Hasanain SK et al (2007) Synthesis and magnetic properties of cobalt (CoFe2O4) nanoparticles prepared by wet chemical route. J Magn Magn Mater 308(2):289–295
Lin CS, Hwang CC, Huang TH et al (2007) Fine powders of SrFe12O19 with SrTiO3 additive prepared via aquasi-dry combustion synthesis route. Mater Sci Eng B139:24–36
Nawathey-Dikshit R, Shinde SR, Ogale SB et al (1996) Synthesis of single domain strontium ferrite powder by pulsed laser ablation. Appl Phys Lett 68(24):3491
Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (Grant No. 50674048) and China Postdoctoral Science Foundation (Grant No. 20080431069).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Shen, X., Liu, M., Song, F. et al. Structural evolution and magnetic properties of SrFe12O19 nanofibers by electrospinning. J Sol-Gel Sci Technol 53, 448–453 (2010). https://doi.org/10.1007/s10971-009-2119-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10971-009-2119-7