Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 208, Issue 1-2, Pages 13-19Publisher
ELSEVIER
DOI: 10.1016/S0304-8853(99)00585-5
Keywords
ferrites; citrate method; low temperature processing; magnetic properties; microstructure
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Magnetic properties such as Curie temperature, saturation magnetisation, hysteresis loop and permeability loss factor of various compositions of NiZn ferrites prepared by the non-conventional citrate precursor method are reported. The optimum properties are obtained for samples sintered at 1200 degrees C. The significant advantages of this method of preparation are: (i) the low relative loss factor, tan delta/mu(i), of the order of 10(-4)-10(-5) in the frequency range 100 kHz to 8 MHz, depending upon the composition, (ii) reduction in the sintering temperature by atleast 100 degrees C and(iii) reduction in the sintering time from more than 3 h for the conventional method to Ih in the present method. (C) 2000 Elsevier Science B.V. All rights reserved.
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