Abstract
Photon emission from Ni atoms sputtered by argon ions of 5 keV energy was observed as a function of target temperature. During the experiment a metallic target was continuously exposed to oxygen at a controlled pressure. Both photon and sputtering yield exhibited a maximum at 631 K which is exactly equal to the Curie point of the bulk of the metallic nickel. Some conclusions on the structure and magnetic properties of the surface layer are presented.
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