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- Title
Microwave synthesis and effect of CTAB on ferromagnetic properties of NiO, CoO and NiCoO nanostructures.
- Authors
Anandha Babu, G.; Ravi, G.; Hayakawa, Y.
- Abstract
Cubic-structured NiO, CoO and spinel-structured NiCoO were synthesized via microwave route. The structural properties of NiO, CoO and NiCoO nanostructures were investigated by X-ray diffraction analysis, and it showed smaller crystallite size for NiO than CoO and NiCoO by using Williamson-Hall method. Flake-like and hexagonal plate-like morphologies were ascertained from HRSEM and TEM analyses. Optical properties of these materials were investigated by photoluminescence study, and it presents the band edge emission for all materials with supplementary emissions in visible region due to the presence of defects such as vacancy and interstitial. Raman and FTIR spectra provide the functional characteristics of NiO, CoO and NiCoO nanostructures. XPS measurement revealed the purity and composition of these nanostructures. Room temperature magnetic measurements were investigated using vibrating sample magnetometer. The low coercivity and remanent magnetization for NiO, CoO and NiCoO nanostructures confirmed that these nanoparticles exhibit a weak ferromagnetic behaviour.
- Subjects
CETYLTRIMETHYLAMMONIUM bromide; MICROWAVES; FERROMAGNETIC materials; NANOSTRUCTURES; X-ray diffraction
- Publication
Applied Physics A: Materials Science & Processing, 2015, Vol 119, Issue 1, p219
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-014-8951-9