Local X-ray magnetic circular dichroism study of Fe/Cu(111) using a tunneling smart tip
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- 作者：Andrew DiLullo ; Nozomi Shirato ; Marvin Cummings ; Heath Kersell ; Hao Chang ; Daniel Rosenmann ; Dean Miller ; John W. Freeland ; Saw-Wai Hla and Volker Rose
- 关键词：synchrotron X-ray scanning tunneling microscopy ; smart tip ; XMCD ; chemical contrast
- 刊名：Journal of Synchrotron Radiation
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：23
- 期：2
- 页码：574-578
- 全文大小：582K
- ISSN：1600-5775
文摘
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.