The preparation of FePt/BN particle films with perpendicular texture by magnetron sputtering

Abstract

［FePt/BN］n multilayers were prepared on MgO (100) single crystal substrates at 250℃ with magnetron sputtering. The perpendicular texture of L10-FePt/BN particle films was formed after vacuum annealing. The results of X-ray diffraction and magnetic tests show that the ［FePt(2nm)/BN(0.5nm)］10 and ［FePt(1nm)/BN(0.25nm)］20 multilayers have excellent (001) texture when the films were sputtered on substrates at 250℃ after annealed at 700℃ for 1h. The mean size of L10-FePt particles is roughly 15—20nm and its perpendicular coercive force reaches 522 kA/m. Moreover, the Mr/Ms and switching filed distribution S* reach 0.99 and 0.94, respectively. This particle film is a candidate for future perpendicular magnetic recording media with ultrahigh density.