Magnetoplumbite (PbFe12O19) powders were obtained by the thermal decomposition, at 900 °C of nitrates dissolved in ethylene glycol. The hysteresis loops showed that the predominant magnetisation mechanism is coherent rotation and a remarkably high value of coercivity (5 kOe) was obtained. Cell parameters, Curie temperature and hysteretic properties are reported. A study of the magnetic after effect is also presented. The results are compared with those obtained for Sr-M sintered compacts with submicronic particles obtained from chemically coprecipitated powders. The dependence of the viscosity coefficient (S) and the viscosity parameter (Sv) on the applied magnetic field were determined at temperatures between 77 and 300 K.

Magnetic properties of PbFe12O19 hexaferrites powders obtained by metallorganic decomposition

Watts;
1997

Abstract

Magnetoplumbite (PbFe12O19) powders were obtained by the thermal decomposition, at 900 °C of nitrates dissolved in ethylene glycol. The hysteresis loops showed that the predominant magnetisation mechanism is coherent rotation and a remarkably high value of coercivity (5 kOe) was obtained. Cell parameters, Curie temperature and hysteretic properties are reported. A study of the magnetic after effect is also presented. The results are compared with those obtained for Sr-M sintered compacts with submicronic particles obtained from chemically coprecipitated powders. The dependence of the viscosity coefficient (S) and the viscosity parameter (Sv) on the applied magnetic field were determined at temperatures between 77 and 300 K.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/132604
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