Magnetic characterization of nanocrystalline Ni–Zn ferrite powder prepared by the glyoxylate precursor method

• Published in: Journal of physics. D, Applied physics Vol. 35; no. 23; pp. 3035 - 3040
• Main Authors: Caizer, C, Stefanescu, M
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 07.12.2002; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Physics; Nickel oxides; Temperature dependence; Powders; Annealing; Inorganic compounds; Magnetization; Transition element compounds; Magnetic hysteresis; XRD; Experimental study; Lattice parameters; Precursor; DTA; Zinc oxides; Ferrites spinels; Domain structure; Magnetic domains; Coercive force; Iron oxides; Chemical synthesis; Quaternary compounds; Nanocrystal; Saturation magnetization
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/35/23/301

Nanocrystalline Ni(0.35)Zn(0.65)Fe2O4 mixed ferrite was obtained from the Fe2(Ni(0.35),Zn(0.65))(OH)4(C2H2O4)2(dot)H2O complex combination that corresponds to the atomic ratio Ni(II) : Zn(II) : Fe(III) = 0.35 : 0.65 : 2; the complex combination was decomposed at 325 C and the resulting oxides mixture was annealed in the temperature range of 400-1000 C for 2 h. The thermal analysis of the synthesized complex combination was done by TG-DTA techniques. It is shown by means of X-ray diffraction that even at 400 C Ni-Zn mixed spinel ferrite is formed with a face-centered cubic structure and a lattice parameter that is in agreement with the reported value. Thus, the formation temperature of ferrite is drastically reduced (by about 900 C) compared to that of the conventional ceramic method. (Author)