Highly (001)-oriented Ni-doped L1(0) FePt films and their magnetic properties - art. no. 10H309

摘要

We report on Ni-doped nonepitaxial L1(0) FePt thin films with strong (001) texture. The influences of Ni doping on L1(0) ordering, orientation, and the magnetic properties of the FePt films have been investigated. In-plane and out-of-plane x-ray diffractions (XRD) were used to analyze the texture of FeNiPt films. For Fe(0.38 nm)/Ni(0.04 nm)/Pt(0.4)(13) sample, the out-of-plane XRD data showed only (001) peaks and in-plane data showed (hk0) peaks after annealing, indicating high (001) texture of the FeNiPt films. In comparison with FePt, the (001) peak positions shifted to higher angle, indicating partial Ni substitution in the L1(0) lattice. The coercivity, measured at room temperature, decreased as a function of Ni doping. For the film with a Ni layer thickness of 0.06 nm, the coercivity is about 6 kOe after annealing, which is suitable for the writing performance of high-anisotropy perpendicular recording media. (c) 2005 American Institute of Physics.