Enhancement of the magnetic properties of Ni-Cu-Zn ferrites with the substitution of a small fraction of lanthanum for iron
- Department of Ceramic Engineering, National Institute of Technology, Rourkela 769008 (India)
The effect of lanthanum ion substitution for iron on the structural and magnetic properties of Ni-Cu-Zn ferrite is reported. The (Ni{sub 0.25}Cu{sub 0.20}Zn{sub 0.55})La {sub x}Fe{sub 2-x}O{sub 4} ferrite compositions with x = 0.0, 0.025, 0.050 and 0.075, were synthesized by nitrate-citrate auto-combustion route. Rietveld structure refinement was carried out to evaluate; La solubility in spinel, residual stress in sintered core, quantity of secondary LaFeO{sub 3} phase formed and change in lattice parameters, etc. Density, crystallite size, grain size, residual macrostress and initial permeability were directly affected by the substitution. A significant increase in initial permeability was achieved by a small fraction of La substitution. The La solubility in the Ni-Cu-Zn ferrite lattice was found very low ({approx}0.1 atom/unit cell). Co-relations between magnetic properties and measured physical/structural properties were discussed.
- OSTI ID:
- 20900947
- Journal Information:
- Materials Research Bulletin, Vol. 42, Issue 1; Other Information: DOI: 10.1016/j.materresbull.2006.05.009; PII: S0025-5408(06)00208-X; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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