AVS 47th International Symposium
    Magnetic Interfaces and Nanostructures Tuesday Sessions
       Session MI-TuP

Paper MI-TuP4
Magnetic Transition at the Gd(0001) Surface

Tuesday, October 3, 2000, 5:30 pm, Room Exhibit Hall C & D

Session: Poster Session
Presenter: C.S. Arnold, National Institute of Standards and Technology, Boulder
Authors: C.S. Arnold, National Institute of Standards and Technology, Boulder
D.P. Pappas, National Institute of Standards and Technology, Boulder
Correspondent: Click to Email
Controversy surrounds the magnetic ordering properties of the Gd(0001) surface. Several reports conclude that the surface has an it\{extraordinary} transition, ordering at a Curie temperature significantly higher than that of the bulk, while others reports have failed to reproduce this result. Our experiments unambiguously prove that the Gd(0001) surface has an ordinary transition. Furthermore, by analyzing both the bulk and surface magnetization, we show that Gd(0001) films are good realizations of semi-infinite, 3-dimensional Heisenberg ferromagnets with identical exchange couplings for surface and bulk, and identical Curie temperatures.