IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Magnetic Interfaces and Nanostructures Thursday Sessions
       Session MI-ThP

Paper MI-ThP2
X-ray Magnetic Linear Dichroism of Fe-Ni Alloys on Cu(111)

Thursday, November 1, 2001, 5:30 pm, Room 134/135

Session: Magnetic Thin Films & Surfaces Poster Session
Presenter: T.F. Johnson, University of California, Davis
Authors: T.F. Johnson, University of California, Davis
S. Chiang, University of California, Davis
Y. Sato, University of California, Davis
D.A. Arena, Lawrence Livermore National Laboratory
S.A. Morton, University of Missouri-Rolla
M. Hochstrasser, Lawrence Livermore National Laboratory
J.G. Tobin, Lawrence Livermore National Laboratory
J.D. Shine, University of California, Davis
J.A. Giacomo, University of California, Davis
G.E. Thayer, University of California, Davis
D.P. Land, University of California, Davis
X.D. Zhu, University of California, Davis
G.D. Waddill, University of Missouri-Rolla
Correspondent: Click to Email

We have prepared Fe@subx@Ni@sub1-x@ multilayers on Cu(111) in order to learn how to control the structure and magnetism of these thin alloy films, which are relevant to the giant magnetoresistance (GMR) effect used in magnetic disk drive heads. Using the Spectromicroscopy Facility (7.0.1.2) on Undulator Beamline 7.0 at the Advanced Light Source, we have measured X-ray magnetic linear dichroism (XMLD) signals from both Fe and Ni 3p lines for fourteen different thin Ni-Fe alloy films on Cu(111), with Fe concentration ranging from 9% to 84% and for a variety of film thicknesses. The Curie temperature for all of these samples was in the range 200K to 500K. For many of these films, the Curie temperature was considerably lower than was previously seen for similar films deposited on Cu(100). For a particular Fe concentration x, the Curie temperature increases with alloy film thickness. For a specific film thickness, the Curie temperature has a maximum near x=0.4. We have also measured the Fe and Ni asymmetries as a function of Fe concentration.