Evaluation of magnetization process and magnetic interactions in the double-layered perpendicular magnetic recording media

Ferromagnetic Hall effect (FHE) measurement is effective in performing the simultaneous evaluation of a recording layer (RL) with a soft magnetic under layer (SUL), i.e. a double-layered (DL) perpendicular magnetic recording media. A Co-Cr-Ta-Pt(100nm)/Ni-Fe(50mn) thin film, deposited by a facing targets sputtering apparatus, was evaluated using FHE measurement. The manipulation of different FHE responses from the RL and SUL is useful in evaluating their magnetic properties and overcome the limitations confronted by conventional methods.