High coercivity L 10 FePt films with perpendicular anisotropy deposited on glass substrate at reduced temperature

Abstract

The microstructures and magnetic properties of FePt films grown at 350°C on glass substrates with MgO (200) intermediate layer and CrRu (200) underlayer were investigated. The film with 1 nm MgO intermediate layer showed higher degree of chemical ordering than that with 4 nm MgO layer due to the compression of the lattice constant of 1 nm MgO intermediate layer along the [100] direction. Isolated FePt particles were formed when nominal thickness of FePt was 4 nm. The room temperature coercivity of isolated FePt particles with 1 nm MgO intermediate layer was as high as 12 kOe, significantly larger than that with 4 nm MgO intermediate layer (6.3 kOe). © 2007 American Institute of Physics.