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Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films

H. Ott·S. J. Heise·R. Sutarto·Z. Hu·C. F. Chang·H. H. Hsieh·H. -J. Lin·C. T. Chen·L. H. Tjeng
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Abstract

We report on the growth and characterization of ferromagnetic Gd-doped EuO thin films. We prepared samples with Gd concentrations up to 11% by means of molecular beam epitaxy under distillation conditions, which allows a very precise control of the doping concentration and oxygen stoichiometry. Using soft x-ray magnetic circular dichroism at the Eu and Gd M4,5 edges, we found that the Curie temperature ranged from 69 K for pure stoichiometric EuO to about 170 K for the film with the optimal Gd doping of around 4%. We also show that the Gd magnetic moment couples ferromagnetically to that of Eu.

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H. Ott, S. J. Heise, R. Sutarto, Z. Hu, C. F. Chang, H. H. Hsieh, H. -J. Lin, C. T. Chen, L. H. Tjeng. 2005-09-28. Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films. https://doi.org/10.1103/physrevb.73.094407

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