Microstructure, magnetic properties and exchange-coupling interactions for one-dimensional hard/soft ferrite nanofibers

Journal Article · Sun Jan 15 00:00:00 EST 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.10.009· OSTI ID:21612846

Fuzhan, Song ^[1]; Mingquan, Liu; Jun, Xiang ^[1]

---

1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 (China)

SrFe{sub 12}O{sub 19} (SFO)/Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} (NZFO) composite ferrite nanofibers with diameters about 120 nm have been prepared by the electrospinning and calcination process. The SFO/NZFO composite ferrites are formed after calcined at 700 Degree-Sign C for 2 h and the composite nanofibers with various mass ratios obtained at 900 Degree-Sign C are fabricated from NZFO grains about 16-40 nm and SFO grains of 19-45 nm with a uniform phase distribution. With the SFO ferrite content increasing, the coercivity (H{sub c}) and remanence (M{sub r}) for the composite ferrite nanofibers initially increase, reaching maximum values of 379.8 kA/m (297 K) and 242.2 kA/m (77 K), 39.1 Am{sup 2}/kg (297 K) and 53.5 Am{sup 2}/kg (77 K), respectively, at a mass ratio (SFO:NZFO) of 4, and then show a reduction tendency with a further increase of the mass ratio. This enhancement in magnetic properties is attributed to the competition of the exchange-coupling interaction and the dipolar interaction in the composite nanofibers. - Graphical abstract: SrFe{sub 12}O{sub 19} (SFO)/Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} (NZFO) composite ferrite nanofibers with a uniform phase distribution show competition of the exchange-coupling interaction and the dipolar interaction in the composite nanofibers. Highlights: Black-Right-Pointing-Pointer Composite ferrite nanofibers have been prepared by the electrospinning. Black-Right-Pointing-Pointer Magnetic exchange-coupling interaction for these nanofibers were analyzed. Black-Right-Pointing-Pointer Nanofibers magnetic properties measured at 297 K and 77 K were discussed.

• OSTI ID: 21612846
• Journal Information: Journal of Solid State Chemistry, Vol. 185; Other Information: DOI: 10.1016/j.jssc.2011.10.009; PII: S0022-4596(11)00537-8; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCINATION
COMPETITION
COUPLING
FERRITE
FERRITES
INTERACTIONS
MAGNETIC PROPERTIES
MASS
MICROSTRUCTURE
NANOSTRUCTURES
ALLOYS
CARBON ADDITIONS
CHEMICAL REACTIONS
DECOMPOSITION
FERRIMAGNETIC MATERIALS
IRON ALLOYS
IRON COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYROLYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENT COMPOUNDS