INFLUENCE OF THE CRYSTAL-LATTICE MODIFICATIONS WITH DOPING IONS ON THE REPTATION OF MAGNETIC RECORDING PARTICLES

Magnetic recording particles are frequently subjected to ionic substitutions in order to improve their magnetic properties for use in recording media. In fine particle systems, the reptation of the magnetization cycles originates in the interaction between the magnetic moments of each particle and the microscopic configuration of the magnetization in the assembly. Therefore, it should be related to the magnetic order in the crystal structure of the particles. In this work the effect of the aforesaid ionic substitutions on the reptation is investigated, which, in general, is increased by the doping as a consequence of the modification of the magnetic order induced by the presence of the substituting ions.