Bulk and surface curie temperatures of Gd(0001)

The magnetic properties of surface and bulk Gd(0001) films epitaxially grown in ultra-high-vacuum on W(110) surfaces have been investigated in situ, by means of Spin Polarized Low Energy Electron Diffraction (SPLEED) and a Magneto-Optic Kerr Effect technique (MOKE). The measurements show that the su...

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Bibliographic Details
Published in:Physica B + C 1985-01, Vol.130 (1), p.72-74
Main Authors: Weller, D., Alvarado, S.F., Campagna, M.
Format: Article
Language:English
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Summary:The magnetic properties of surface and bulk Gd(0001) films epitaxially grown in ultra-high-vacuum on W(110) surfaces have been investigated in situ, by means of Spin Polarized Low Energy Electron Diffraction (SPLEED) and a Magneto-Optic Kerr Effect technique (MOKE). The measurements show that the surface spins undergo a continuous magnetic ordering transition at a critical temperature T cs, which is up to 22 K higher than the bulk ferromagnetic Curie point T cb = (293.0±1) K. This is in agreement with the predictions of the existence of pure surface phase transitions on semi-infinite systems for given strengths of surface and bulk spin couplings.
ISSN:0378-4363
DOI:10.1016/0378-4363(85)90188-3