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Growth induced magnetic and chemical anisotropy in CoPt3 alloy films
J O Cross1, M Newville, F Hellman
1PNC-CAT, Advanced Photon Source, Argonne National Laboratory, IL 60439, USA. jox@pnc.aps.anl.gov
Journal of Synchrotron Radiation
|August 22, 2001
Abstract:
We report the results of polarized Co EXAFS experiments on a series of CoPt3 films grown by molecular beam epitaxy on (100) MgO singe crystal substrates over a range of temperatures from 473 K to 1073 K. These samples exhibit substantial perpendicular magnetic anisotropy that is strongly dependent on the substrate growth temperature Tg. We measure a preference for in-plane Co-Co pairs that is correlated with the magnetic properties.