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Title: Synthesis and characterization of CoFe{sub 2}O{sub 4} nanoparticles with high coercivity

Single crystalline CoFe{sub 2}O{sub 4} nanoparticles with high coercivity were prepared via a one-step hydrothermal method. The shape and size of the nanocrystals (in the range of 20–100 nm) can be controlled by varying synthesis parameters such as the concentration of NaOH and CTAB. X-ray diffraction and Raman spectra analysis confirmed that all the as-synthesized nanoparticles have a face centered cubic spinel crystal structure. HRTEM observation of particles shows interlayer spacing 0.48 nm of (111) lattice planes. A coercive force up to 5.0 kOe and saturation magnetization of 73 emu/g was achieved at room temperature for the 40 nm CoFe{sub 2}O{sub 4} nanoparticles.
Authors:
; ; ;  [1]
  1. Department of Physics, University of Texas at Arlington, Arlington, Texas 76019 (United States)
Publication Date:
OSTI Identifier:
22409929
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT COMPOUNDS; COERCIVE FORCE; CONCENTRATION RATIO; FCC LATTICES; FERRITES; HYDROTHERMAL SYNTHESIS; MAGNETIZATION; MONOCRYSTALS; NANOPARTICLES; NANOSTRUCTURES; RAMAN SPECTRA; SODIUM HYDROXIDES; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION