Structural parameters and magnetic properties of copper ferrite nanopowders obtained by the sol-gel combustion

• Published in: Journal of alloys and compounds 2017-01, Vol.692, p.705-712
• Main Authors: Zhuravlev, V.A., Minin, R.V., Itin, V.I., Lilenko, I. Yu
• Format: Article
• Language: English
• Subjects: Anisotropy; Annealing; Combustion; Copper ferrite; Crystal structure; Ferromagnetic resonance; Heat treatment; Magnetic properties; Magnetic saturation; Magnetocrystalline anisotropy; Nanostructure powders of copper ferrites; Nanostructured materials; Phase composition; Sol-gel combustion; Sol-gel processes; Spinel
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2016.09.069

Phase composition, structure parameters and basic magnetic characteristics obtained by the sol-gel combustion nanopowders of copper ferrite spinel CuFe2O4 are investigated. The values of the fields of magnetocrystalline anisotropy were determined by the FMR method. The comparison of properties of synthesized materials is done: the sample No 1 – immediately after the combustion of the gel, the sample No 2 – after annealing at 623 K for four hours and the sample No 3 – after annealing at 1073 K for four hours. The thermal treatment leads to the increase in the concentration of the phase with tetragonal crystal structure. Particle sizes and the values of anisotropy fields of this phase also increased. The value of the saturation magnetization varies slightly after annealing. •Nanopowders of the copper ferrite were synthesized by the sol-gel combustion method.•The nanopowders are a mixture phase with cubic and tetragonal crystal structures.•Annealing leads to a change in morphology of powders and their magnetic properties.•Magnetic anisotropy of obtained materials was studied by the FMR method.•Their anisotropy fields are differing from the values for monocrystalline samples.