Magnetic properties and microstructure of FePt/MoC/CrRu films

The FePt films with thickness of 4-10 nm were deposited on MoC/CrRu/glass at substrate temperature ranged from 260 to 410 degrees C by using magnetron sputtering and strong (001) textured FePt films were obtained at 380 degrees C and 410 degrees C. The multi-functional MoC conductive intermediate layer was used to resist the Cr diffusion and promote the epitaxial growth of the (001) textured FePt film which shows perpendicular magnetization and a linear-like in-plane magnetic loop. The out-of plane coercivity and shape of demagnetization curve were dominated by the ordering degree and perpendicular magnetic anisotropy which were increased with deposited temperature. The FePt film deposited at 290 degrees C shows continuous morphology and change to interconnected structure at 350 degrees C and finally form the island like structure at 380 degrees C and 410 degrees C. Each island contains many FePt grains and the smaller grains size was 12.2 nm which obtained at 5 urn thick FePt film. Perpendicular anisotropy of 1.1 x 10(7) erg/cm(3) and coercivity of 8.2 kOe have been demonstrated in 7 nm thick FePt film. (C) 2015 Elsevier B.V. All rights reserved.