Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10710267 | Journal of Magnetism and Magnetic Materials | 2005 | 6 Pages |
Abstract
Single phase Ba-Nd-Co M-type ferrite fine particles were prepared by the chemical coprecipitation method and subsequent heat treatment method. Optimum magnetic properties were achieved with materials of composition Ba2+0.99 Nd3+0.118 Co2+0.041 Fe3+11.86 O2â19 and heat treatment of 1000°CÃ2 h in air. The magnetic and physical properties are Ïs=80.7Ã10-6 Wb m/kg(64.2 emu/g), HcJ=479.2kA/m(5.99 kOe), Tc=452âC, the lattice constants a=0.5889nm, c=2.318nm, the activation energy = 295.3 kJ/mol(70.31 kcal/mol), and the average particle size = 0.15 μm. Temperature coefficient of the intrinsic coercivity (0.07%/°C) of these powder were found to be very small.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
H. Yamamoto, M. Isono, T. Kobayashi,