Abstract
Well-aligned Co3O4 nanotubes were synthesized within the nanochannels of porous anodic alumina membranes using a single-source chemical vapor deposition method. Scanning electron microscopy and transmission electron microscopy showed that the Co3O4 nanotubes are highly ordered with uniform diameter in the range of 100–300 nm and length up to tens of microns. X-ray diffraction, the Raman spectrum, energy-dispersive spectroscopy and selected-area electron diffraction demonstrated that the nanotubes are composed of pure cubic phase polycrystalline Co3O4. Magnetic measurements using a SQUID magnetometer suggested the presence of a strong antiferromagnetic interaction with Weiss constant θ= -248 K. The real and imaginary parts of the ac susceptibility at f= 10 Hz had a maximum at 4.0 K, and the field dependence of the magnetization at 1.8 K showed a small hysteresis loop with a coercivity of ∼ 98 Oe.
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81.07.De; 81.15.Gh; 78.30.-j; 75.75.+a; 61.46.Np
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Shen, XP., Miao, HJ., Zhao, H. et al. Synthesis, characterization and magnetic properties of Co3O4 nanotubes. Appl. Phys. A 91, 47–51 (2008). https://doi.org/10.1007/s00339-007-4361-6
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DOI: https://doi.org/10.1007/s00339-007-4361-6