- DiLullo, Andrew;
- Shirato, Nozomi;
- Cummings, Marvin;
- Kersell, Heath;
- Chang, Hao;
- Rosenmann, Daniel;
- Miller, Dean;
- Freeland, John W;
- Hla, Saw-Wai;
- Rose, Volker
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 Fe L2,3-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.