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

Conference · Sat Mar 31 23:00:00 EST 2001

DOI:https://doi.org/10.1557/PROC-674-U7.9· OSTI ID:15005283

Johnson, T F; Chiang, S; Sato, Y; Arena, D A; Morton, S A; Hochstrasser, M; Tobin, J G; Shine, J D; Giacomo, J A; Thayer, G E; Land, D P; Zhu, X D

We have prepared Fe{sub x}Ni{sub 1-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 {approx} 0.4.

• Research Organization: Lawrence Livermore National Lab., CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 15005283
• Report Number(s): UCRL-JC-142184
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
CURIE POINT
DICHROISM
IRON ALLOYS
MAGNETIC DISKS
MAGNETORESISTANCE
NICKEL ALLOYS
SUBSTRATES