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Title: Local X-ray magnetic circular dichroism study of Fe/Cu(111) using a tunneling smart tip

Localized spectroscopy with simultaneous topographic, elemental and magnetic information is presented. A synchrotron X-ray scanning tunneling microscope has been employed for the local study of the X-ray magnetic circular dichroism at the FeL2,3-edges of a thin iron film grown on Cu(111). Polarization-dependent X-ray absorption spectra have been obtained through a tunneling smart tip that serves as a photoelectron detector. In contrast to conventional spin-polarized scanning tunneling microscopy, X-ray excitations provide magnetic contrast even with a non-magnetic tip. Intensity variations in the photoexcited tip current point to chemical variations within a single magnetic Fe domain.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [1] ;  [1] ;  [2] ;  [3] ;  [5]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Ohio Univ., Athens, OH (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Ohio Univ., Athens, OH (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
OSTI Identifier:
1245212
Grant/Contract Number:
AC02-06CH11357; SC70705; FG02-02ER46012
Type:
Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 23; Journal Issue: 2; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Research Org:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY synchrotron X-ray scanning tunneling microscopy; smart tip; XMCD; chemical contrast