ISSN:
1434-6036
Keywords:
PACS. 75.70.-i Magnetic films and multilayers - 78.70.Dm X-ray absorption and absorption edges - 75.30.Gw Anisotropy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: Polarized X-ray absorption fine structure (XAFS) measurements at the Co K and Pt L3 edges show that the perpendicular magnetic anisotropy found in epitaxial fcc CoPt3 (111) films stems from the existence of anisotropic local ordering. Such ordering, induced during the codeposition process and dependent on the growth temperature, is characterized by preferential CoCo pairs in the film plane, balanced by preferential CoPt pairs out of the plane, resulting from some Co 2D-segregation. Polarized XAFS at the Pt edge reveals similar anisotropic local ordering in epitaxial hcp Co3Pt (0001) films exhibiting a larger magnetocrystalline anisotropy compared to that of bulk hcp Co. Besides, a polarization dependence of the Co XANES profile is observed only for the Co3Pt films exhibiting hcp symmetry.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510050621
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