Effects Of Ru Underlayer On Microstructures And Magnetic Properties Of Co_(72)pt_(28) Thin Films

摘要

The effects of Ru underlayer on crystallographic structure, microstructures, and magnetic properties of Co_(72)Pt_(28) films were investigated. It was observed that Ru deposition pressure played a more important role in determining the crystallographic texture compared to Ru thickness. Ru had a preferred (0002) texture when deposited at low Ar pressure and induced perpendicular magnetic anisotropy for Co_(72)Pt_(28). However, at high Ar pressure, Ru (1011) and Ru (1011) peaks appeared that changed the easy axes of magnetization of Co_(72)Pt_(28) film from out-of-plane to in-plane directions. With increasing thickness of Ru top layer in the dual-layer structure of Ru underlayer, coercivities increased due to increased magnetic anisotropy and reduced intergranular magnetic interaction.