Article ID Journal Published Year Pages File Type
1689195 Vacuum 2010 5 Pages PDF
Abstract

Granular (FePt)100−x–(NiO)x nanocomposite thin films with x = 0 − 42 vol% were fabricated on a natural-oxidized Si(100) substrate. It is found that both the coercivity and FePt domain size decrease with increasing NiO content for the (FePt)100−x–(NiO)x films. When the FePt–NiO composite film with NiO content of 10.4 vol% is post-annealed at 750 °C with a high heating ramp rate of 100 °C/s, the in-plane coercivity (Hc//) and perpendicular coercivity (Hc⊥) of the FePt films are 513 and 430 kA/m, respectively. On the other hand, we used conductive atomic force microscope (CAFM) to confirm that the NiO compound is distributed at boundary of FePt particles that will constrain the domain size of FePt and decrease the exchange coupling interactions between FePt magnetic particles.

Related Topics
Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
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