A. Taufiq, N. Wahyuni, W. Elyani, S. Sunaryono, N. Hidayat, N. Mufti, A. Hidayat
Ferrite nanoparticles have become interesting materials originating from their performances in many applications. In this paper, the preparation metal-doped ferrites in the system of Fe2.9Cr0.1O4 nanopowders is reported. The Cr0.1Fe2.9O4 nanopowders were utilized to produce ferrofluids. The Indonesian sand was used as a raw material to prepare the samples using co-precipitation route. The Fe2.9Cr0.1O4 particles structured in cubic spinel with the particle size and lattice parameter of about 9.4 nm and 8.36 Å, respectively. The band gap energy of the Cr0.1Fe2.9O4 nanopowders was 2.26 eV. Furthermore, the saturation magnetization of the powder was higher than that of the fluid as the effect of particle size and aggregation. © Published under licence by IOP Publishing Ltd.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia
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