Oxygen Induced Suppression of the Surface Magnetization of Gd(0001)

Authors

• D.N. McIlroy, University of Nebraska-Lincoln
• C. Waldfried, University of Nebraska-Lincoln
• Dongqi Li, Materials Science Division, Argonne National Laboratory, Argonne, Illinois
• J. Pearson, Materials Science Division, Argonne National Laboratory, Argonne, Illinois
• S.D. Bader, Materials Science Division, Argonne National Laboratory, Argonne, Illinois
• D.-J. Huang, Brookhaven National Laboratory
• P.D. Johnson, Brookhaven National Laboratory
• R.F. Sabiryanov, University of Nebraska-Lincoln
• Sitaram Jaswal, University of NebraskaFollow
• Peter A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

April 1996

Comments

Published American Physical Society. Copyright 1996. Permission to use. Phys. Rev. Lett. 76 (1996) 2802-2805. http://prb.aps.org/.

Abstract

The effects of oxygen adsorption on the surface magnetization of Gd(0001) have been determined by measuring the polarization of the Gd 4f core levels and the oxygen induced states with spin-resolved photoemission. Calculations of the partial density of states of O/Gd(0001) using the LMTO-ASA method support the photoemission measurements, which indicate that oxidation occurs at low coverages. The loss of surface magnetic order with oxygen exposure is explained in terms of decreasing indirect coupling.