Magnetic Imaging

X-ray circular magnetic dichroism (XMCD) PEEM

XMCD-PEEM is very powerful for element-resolved imaging of magnetic structures. The pioneering experiments were performed by Stöhr et al. [1]. Today, XMCD-PEEM is employed at most Synchrotron sources of the world. It allows detailed studies of the magnetic structure, in particular in heterostructures like ferromagnetic thin-film elements or coupled magnetic layers for devices.

Magnetic contrast with laboratory sources

In the quest to achieve magnetic contrast using laboratory light sources, magnetic dichroism in threshold photoemission is investigated. The pioneering work of Marx et al. [2] established threshold linear dichroism. More recent work in Japan [3,4] and in our group [5,6,7,8] showed sizeable circular dichroism in 1PPE and 2 PPE at the threshold.
      
[1] J. Stöhr, Y. Wu, M.G. Samant, B.D. Hermsmeier, G. Harp, S. Koranda, D. Dunham, B.P. Tonner, Science 259 (1993) 658.
[2] G.K.L. Marx, H.J. Elmers, G. Schönhense; Phys. Rev. Lett. 84 (2000) 5888-91
[3] T. Nakagawa et al. Phys. Rev. Lett. 96, 237402 (2006)
[4] T. Nakagawa et al. Rev. Sci. Instrum. 78, 023907 (2007)
[5] K. Hild, J. Maul, T. Meng, M. Kallmayer, G. Schönhense, H.J. Elmers, Journal of Physics: Condensed Matter, 20, 235218 (2008)
[6] Hild, K., Emmel, J., Schönhense, G. & Elmers, H.J.; Physical Review B 80(22), 224426 (2009)
[7] Hild, K., Maul, J., Schönhense, G., Elmers, H.J., Amft, M. & Oppeneer, P.M.; Phys. Rev. Lett. 102(5), 057207-4, (2009)
[8] Hild, K., Schönhense, G., Elmers, H.J., Nakagawa, T., Yokoyama, T., Tarafder, K. & Oppeneer, P.M.; Phys. Rev. B 82(19), 195430, (2010)

The field is reviewed in:
C. M. Schneider and G. Schönhense
Investigating Surface Magnetism by Means of Photoexcitation Electron Emission Microscopy (PEEM)
Rep. Prog. Phys. 65 (2002) R1785-1839

 

 


 

Last update: Monday, 23-Sep-2013 13:10:17 CEST Email D. Panzer Impressum