High coercivity L10 FePt films with perpendicular anisotropy deposited on glass substrate at reduced temperature

The microstructures and magnetic properties of FePt films grown at 350 degrees 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). (c) 2007 American Institute of Physics.