Spin-polarized photoemission studies of the exchange splitting of the Gd 5d electrons near the Curie temperature

Authors

• Dongqi Li, Argonne National Laboratory, Argonne, Illinois
• J. Pearson, Argonne National Laboratory, Argonne, Illinois
• S.D. Bader, Argonne National Laboratory, Argonne, Illinois
• D.N. McIlroy, University of Nebraska-Lincoln
• C. Waldfried, University of Nebraska-Lincoln
• Peter A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

May 1995

Comments

Published by American Physical Society. Copyright 1995. Permission to use. Phys. Rev. B 51 (1995) 13895-13898. http://prb.aps.org/.

Abstract

Spin-polarized photoemission was employed to investigate the temperature dependence of the exchange splitting of Gd(0001) for both the surface state near the Fermi level E_F and the 5d bulk bands. The bulk bands at 1–2 eV below E _F show Stoner-like behavior where two peaks with opposite spin polarization shift toward each other as the temperature increases. In contrast, the temperature dependence of the surface state indicates spin-mixing behavior due to fluctuating local moments. These differences are attributed to the degree of itinerancy of the 5d electrons in the two cases.