Effects of deposition temperature and in-situ annealing time on structure and magnetic properties of (001) orientation FePt films

Authors

Yongsheng Yu, Jilin UniversityFollow
T A. George, University of Nebraska-LincolnFollow
Haibo Li, Jilin Normal University
Daqian Sun, Jilin University
Zhenan Ren, Jilin University
David J. Sellmyer, University of Nebraska at LincolnFollow

Date of this Version

2012

Citation

Journal of Magnetism and Magnetic Materials 328 (2013)

Abstract

FePt films were prepared on (100) oriented single crystal MgO substrates at high temperature rang-ing from 620 until 800°C and in-situ annealed for different times ranging from 0 to 60 min to obtain ordered FePt films. The structural analysis indicates that FePt films grow epitaxially on MgO (100) substrates. Both increasing deposition temperature and in-situ annealing time enhance the (001) tex-ture and ordering of FePt films. The magnetic analysis shows that these L10 FePt films have perpen-dicular anisotropy and the easy magnetization c-axis is perpendicular to the film plane. Magnetization reversal is controlled by a rotational mechanism. The hard magnetic properties of the films are improved with increasing deposition temperature or in-situ annealing time.