Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1531200 | Materials Science and Engineering: B | 2007 | 5 Pages |
Abstract
We have studied the orientation and magnetic properties of FePt and CoPt films deposited by electron-beam co-evaporation on MgO(1 1 0) single-crystal substrates at substrate temperatures from 500 to 700 °C. We observed that long-range chemical ordering of the L10 structure occurred over the entire range of substrate temperatures in FePt films and at 600 °C and up in CoPt films. Growth of FePt and CoPt yielded epitaxial films with cube-on-cube orientation of the pseudo-cubic L10 lattice with respect to the cubic MgO. X-ray diffraction patterns and magnetization loops of the FePt and CoPt films revealed the existence of L10 domains with the tetragonal c axis inclined at 45° to the film plane, orientations (0 h h) and (h 0 h), as well as L10 domains with the tetragonal c axis in the plane of the film, orientation (h h 0). The FePt and CoPt films for which X-ray diffraction indicated tetragonal phase was present all exhibited hard magnetic properties with easy axis along the [0 0 1] substrate direction as well as large in-plane magnetocrystalline anisotropy.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Minghui Yu, H. Ohguchi, A. Zambano, I. Takeuchi, J.P. Liu, D. Josell, L.A. Bendersky,