EPJ Web of Conferences
Volume 40, 2013JEMS 2012 – Joint European Magnetic Symposia
|Number of page(s)||3|
|Section||Magnetic nanostructures, surfaces and interfaces|
|Published online||14 January 2013|
Ga+ ion irradiation-induced changes in magnetic anisotropy of a Pt/Co/Pt thin film studied by X-ray magnetic circular dichroism
Photon Factory & Condensed Matter Research Center,
Institute of Materials Structure Science, High Energy Accelerator
Research Organization, 305-0801
2 Department of Physics, University of Bialystok, 15-424 Białystok, Poland
3 Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
4 Institute of Physics, Polish Academy of Sciences, 02-668 Warszawa, Poland
Ga+ ion irradiation-induced changes in magnetic anisotropy of a Pt/Co/Pt ultrathin film are investigated by means of the X-ray magnetic circular dichroism (XMCD) technique. A large difference in the Co orbital moment is observed between out-of-plane and in-plane directions of the film at moderate Ga+ fluences of ~1-2×1014 ions/cm2, which corresponds to the perpendicular magnetic anisotropy (PMA), while further increased fluences reduce the orbital moment difference, resulting in in-plane magnetization. In contrast, at much higher Ga+ fluences of ~5×1015 ions/cm2, at which PMA is observed again, no significant difference is found in the orbital moment of Co between out-of-plane and in-plane directions. Different origins are thus suggested for the appearance of PMA induced by the irradiation between moderate and high Ga+ fluences.
© Owned by the authors, published by EDP Sciences, 2013
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